{"id":153768,"date":"2026-01-16T10:18:22","date_gmt":"2026-01-16T01:18:22","guid":{"rendered":"https:\/\/askinno.com\/global\/?p=153768"},"modified":"2026-01-19T11:02:02","modified_gmt":"2026-01-19T02:02:02","slug":"battery-deep-dive-part-1-solid-state-batteries","status":"publish","type":"post","link":"https:\/\/askinno.com\/global\/archives\/153768","title":{"rendered":"[Battery Deep Dive] Part 1: Solid-State Batteries"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#Batteries_as_the_Center_of_the_EV_Era\" >Batteries as the Center of the EV Era<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#SK_On_Bets_on_the_Future_of_Batteries_with_Four_Key_R_D_Priorities\" >SK On Bets on the Future of Batteries with Four Key R&amp;D Priorities<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#Why_Battery_Safety_Matters\" >Why Battery Safety Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#Solid_Electrolytes_A_New_Alternative\" >Solid Electrolytes: A New Alternative<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#A_Bridge_to_Solid-State_Polymer%E2%80%93Oxide_Composite_Batteries\" >A Bridge to Solid-State: Polymer\u2013Oxide Composite Batteries<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#The_Final_Step_in_the_Electrolyte_Technology_Roadmap_Sulfide-Based_Solid-State_Battery\" >The Final Step in the Electrolyte Technology Roadmap: Sulfide-Based Solid-State Battery&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/askinno.com\/global\/archives\/153768\/#SK_On_Sets_a_New_Safety_Benchmark_with_Solid-State_Technology\" >SK On Sets a New Safety Benchmark with Solid-State Technology<\/a><\/li><\/ul><\/nav><\/div>\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"Batteries_as_the_Center_of_the_EV_Era\"><\/span><strong>Batteries as the Center of the EV Era<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>Electric vehicles (EVs) are entering a true mass-market phase, with adoption accelerating all over the world. The International Energy Agency (IEA) projects that by 2030, more than 40% of all new cars sold globally will be electric. At the center of this shift is the battery, the \u201cheart\u201d that determines an EV\u2019s performance, safety, and cost. However, there is some trepidation around EVs, as consumers participating in a Deloitte study cited battery safety \u2014 including potential thermal issues \u2014 along with driving range and charging time as key concerns when considering the purchase of an EV. Global consulting firm PwC also notes that more than half of prospective EV buyers prefer affordable and mid-priced models, a trend closely tied to battery cost competitiveness, as batteries can account for about 40% of a vehicle\u2019s total cost. Ultimately, there are two core considerations in the battery industry: safety and cost.<\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"SK_On_Bets_on_the_Future_of_Batteries_with_Four_Key_R_D_Priorities\"><\/span><strong>SK On Bets on the Future of Batteries with Four Key R&amp;D Priorities<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>Responding to these shifts, SK On has identified strategic R&amp;D priorities. To improve safety, it is focusing on solid-state batteries and thermal propagation (TP) prevention solutions, and to strengthen cost competitiveness, it is prioritizing the dry electrode process and cell-to-pack (CTP) design. Together, these priorities outline a technology innovation roadmap that spans the entire battery system, from cell to pack. Through a four-part deep dive series, SK Innovation Newsroom is exploring each of these technologies, with this edition focusing on solid-state batteries.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/4.SKO_RD_01\ud3b8_\uacf5\ud1b5_ENG_1000px.png\" alt=\"\" class=\"wp-image-153787\" srcset=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/4.SKO_RD_01\ud3b8_\uacf5\ud1b5_ENG_1000px.png 1000w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/4.SKO_RD_01\ud3b8_\uacf5\ud1b5_ENG_1000px-300x200.png 300w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/4.SKO_RD_01\ud3b8_\uacf5\ud1b5_ENG_1000px-768x512.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>SK On\u2019s safety-first strategy centers on next-generation solid-state batteries \u2014 which aim to improve cell-level safety and performance \u2014 and TP prevention technologies that reinforce safety at the pack level.<\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"Why_Battery_Safety_Matters\"><\/span><strong>Why Battery Safety Matters<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>A battery consists of dozens \u2014 or even hundreds \u2014 of individual cells. Each cell stores and releases energy, and when combined, they generate the immense power required to move an electric vehicle. So, what factors can undermine battery safety<\/p>\n\n\n\n<p>1) <strong>When the cathode and anode make contact<\/strong> &#8211; Lithium-ion batteries used in EVs consist of a cathode, anode, separator, and electrolyte. During charging, lithium ions move from the cathode to the anode, traveling through the electrolyte \u2014 the \u201chighway\u201d for ion movement. The separator prevents the two electrodes from touching. If the separator is damaged, a short circuit can occur.<\/p>\n\n\n\n<p>2) <strong>The flammability of liquid electrolytes<\/strong> &#8211; Liquid electrolytes enable fast ion transport and high output, and are easy to use in mass production. However, they contain inherently flammable components.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/5.SKO_RD_1\ud3b8_Info-01_ENG.png\" alt=\"\" class=\"wp-image-153770\" srcset=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/5.SKO_RD_1\ud3b8_Info-01_ENG.png 1000w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/5.SKO_RD_1\ud3b8_Info-01_ENG-300x200.png 300w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/5.SKO_RD_1\ud3b8_Info-01_ENG-768x512.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"Solid_Electrolytes_A_New_Alternative\"><\/span><strong>Solid Electrolytes: A New Alternative<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>What if, instead of liquid, a solid electrolyte is used? Solid electrolytes offer improved structural stability, significantly reducing the risk of leakage or gas buildup, and can support higher energy density. For these reasons, all-solid-state batteries are often referred to as the \u201cdream battery.\u201d<\/p>\n\n\n\n<p>According to SNE Research, the global solid-state battery market is projected to reach 493GWh by 2035, accounting for 6.1% of the total battery market. However, because manufacturing solid-state batteries is highly complex, it presents major technical hurdles. As a result, most companies are aiming for commercialization by around 2030.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/6.SKO_RD_1\ud3b8_Info-02_ENG.png\" alt=\"\" class=\"wp-image-153773\" srcset=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/6.SKO_RD_1\ud3b8_Info-02_ENG.png 1000w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/6.SKO_RD_1\ud3b8_Info-02_ENG-300x200.png 300w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/6.SKO_RD_1\ud3b8_Info-02_ENG-768x512.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"has-small-font-size\">* Dendrite: Tree-like lithium deposits that can form during repeated charging cycles. If they grow long enough to pierce the electrolyte and reach the opposite electrode, a short circuit may occur.<\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"A_Bridge_to_Solid-State_Polymer%E2%80%93Oxide_Composite_Batteries\"><\/span><strong>A Bridge to Solid-State: Polymer\u2013Oxide Composite Batteries<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>To accelerate progress toward solid-state batteries, SK On is developing batteries that utilize a polymer\u2013oxide compositeelectrolyte. Combining polymer and oxide electrolytes, this technology is viewed as a practical step on the roadmap toward all-solid-state systems, and is sometimes categorized as a semi-solid-state battery. The polymer electrolyte \u2014 more flexible than conventional solid electrolytes \u2014 helps lithium ions move more smoothly, while the oxide electrolyte adds strong thermal and chemical stability. Together, this structure increases the solidity of the electrolyte to enhance cell safety and reduce the likelihood of thermal propagation, while also maintaining high compatibility with existing lithium-ion manufacturing processes. With this type of battery as its bridge, SK On is advancing toward its ultimate goal: <em>sulfide-based all-solid-state batteries.<\/em><\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"The_Final_Step_in_the_Electrolyte_Technology_Roadmap_Sulfide-Based_Solid-State_Battery\"><\/span><strong>The Final Step in the Electrolyte Technology Roadmap: Sulfide-Based Solid-State Battery<\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>Using a solid electrolyte composed of sulfur compounds, sulfide-based batteries represent the next generation of battery technology. Because they rely on an electrolyte that is 100% solid, they are classified as all-solid-state batteries, and they offer several key advantages. Sulfide ions feature a soft lattice structure and flexible bonding characteristics, allowing the system to address two key limitations at once: the flammability of liquid electrolytes and the relatively low- ionic conductivity seen in conventional solid-state electrolyte systems. Despite being fully solid, sulfide-based electrolytes enable fast lithium-ion transport and smooth interfacial contact with electrodes. These characteristics help reduce interfacial resistance and support high energy density. SK On is actively developing sulfide-based all-solid-state batteries. The initial commercialization target is to achieve 800 Wh\/L energy density, with the longer-term goal being an increase in energy density to 1,000 Wh\/L.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/7.SKO_RD_1\ud3b8_Info-03_ENG.png\" alt=\"\" class=\"wp-image-153774\" srcset=\"https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/7.SKO_RD_1\ud3b8_Info-03_ENG.png 1000w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/7.SKO_RD_1\ud3b8_Info-03_ENG-300x200.png 300w, https:\/\/askinno.com\/global\/wp-content\/uploads\/sites\/2\/2026\/01\/7.SKO_RD_1\ud3b8_Info-03_ENG-768x512.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>As part of its preparation for future large-scale production of all-solid-state batteries, SK On is developing the necessary technologies while gradually building out the facilities needed for manufacturing. With 2029 as its target for commercialization, the company established an all-solid-state battery pilot plant spanning approximately 4,628 m\u00b2 at its Institute of Future Technology in Daejeon, Korea in the second half of 2025.<\/p>\n\n\n\n<p>Simultaneously, SK On is actively engaged in collaborative research with leading academic institutions, such as its work evaluating the applicability of manganese-rich (LMRO) cathode materials for sulfide-based all-solid-state batteries with Professor Kyu Tae Lee\u2019s team at Seoul National University. The study was selected for the cover of Advanced Energy Materials, a leading international journal in the energy materials field, in 2025.<\/p>\n\n\n\n<h5 class=\"gb-text\"><span class=\"ez-toc-section\" id=\"SK_On_Sets_a_New_Safety_Benchmark_with_Solid-State_Technology\"><\/span><strong>SK On Sets a New Safety Benchmark with Solid-State Technology<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p>SK On is driving safety innovation across every layer of the battery, from cell to pack. At the cell level, the company is strengthening safety as its core through solid-state battery technology. At the pack level, it continues to advance its TP prevention solution, designed to stop heat generated during battery operation from spreading. In the next article in the series, SK On will take a closer look at this TP prevention technology and explore how it further strengthens battery safety.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u25a0 Related articles<\/strong><br><br>- <a href=\"https:\/\/askinno.com\/global\/archives\/153692\" target=\"_blank\" rel=\"noreferrer noopener\">[Expert Lens] How Energy Security Presents a New Opportunity for the Korean Battery Industry<br><\/a><br>- <a href=\"https:\/\/askinno.com\/global\/archives\/153651\" target=\"_blank\" rel=\"noreferrer noopener\">All-Solid-State Batteries: A Game Changer Shaping the Future of the Electric Vehicle Era<\/a><br><br>- <a href=\"https:\/\/askinno.com\/global\/archives\/153727\" target=\"_blank\" rel=\"noreferrer noopener\">Vanadium Ion Batteries: A Potential Cornerstone of Future Energy Storage<br><\/a><br>- <a href=\"https:\/\/askinno.com\/global\/archives\/153680\" target=\"_blank\" rel=\"noreferrer noopener\">SK On Unveils Breakthrough in Next-Generation Cathode Research<\/a><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Batteries as the Center of the EV Era Electric vehicles (EVs) are entering a true mass-market phase, with adoption accelerating all over the world. The International Energy Agency (IEA) projects that by 2030, more than 40% of all new cars sold globally will be electric. At the center of this shift is the battery, the &#8230; <a title=\"[Battery Deep Dive] Part 1: Solid-State Batteries\" class=\"read-more\" href=\"https:\/\/askinno.com\/global\/archives\/153768\" aria-label=\"Read more about [Battery Deep Dive] Part 1: Solid-State Batteries\">Read more<\/a><\/p>\n","protected":false},"author":612,"featured_media":153776,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1911,1912],"tags":[1792,1918,35,730,203,15,648,1937],"class_list":["post-153768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-inno-focus","category-deepdive","tag-all-solid-state-batteries","tag-batteriesmaterials","tag-battery","tag-material","tag-rd","tag-sk-innovation","tag-sk-on","tag-solid-state-batteries"],"acf":[],"_links":{"self":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/153768","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/users\/612"}],"replies":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/comments?post=153768"}],"version-history":[{"count":14,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/153768\/revisions"}],"predecessor-version":[{"id":153807,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/153768\/revisions\/153807"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/media\/153776"}],"wp:attachment":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/media?parent=153768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/categories?post=153768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/tags?post=153768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}