Peking University researchers develop graphene electrode for high-cycle solid-state lithium battery
Peking University researchers developed a graphene-coated lithium metal electrode that allows solid-state batteries to retain 92% capacity after 5,000 cycles, with findings published in Joule. The graphene coating's role in suppressing dendrite growth at the lithium-sulfide electrolyte interface advances a known barrier to commercial solid-state battery adoption, with scale-up trials planned with two Chinese manufacturers for late 2026.
Researchers at Peking University's College of Engineering have developed a graphene-coated lithium metal electrode, enhancing the cycle life of solid-state batteries. This electrode enables the batteries to retain 92 percent capacity after 5,000 cycles at a 1C rate. The study, published in Joule, addresses the dendrite-growth issue that has historically limited the longevity of lithium-metal anodes in solid-state cells. The graphene coating, applied through a low-temperature solution process, creates a uniform and mechanically robust interfacial layer between the lithium metal and a sulfide solid electrolyte.
Lead author Dr. Wang Ying stated that the technology is currently at Technology Readiness Level 4. Her team is collaborating with two Chinese battery manufacturers to scale the process to A-sample cells. Pre-commercial pouch cell trials are planned for late 2026. The research received funding from the National Key R&D Programme and the Chinese Academy of Sciences.
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