Chinese researchers have solved the interface contact challenge in all-solid-state lithium-metal batteries.

Release Date:

2025-10-08

BEIJING, Oct. 7 (Xinhua) — By reporter Liu Zhen: According to the Institute of Physics of the Chinese Academy of Sciences, a research team led by researcher Huang Xuejie, in collaboration with Huazhong University of Science and Technology and the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, has developed an anion‑调控 technology that overcomes the longstanding challenge of achieving intimate contact between the electrolyte and the lithium electrode in all‑solid‑state metal‑lithium batteries, thereby providing critical technical support for their practical application. The relevant findings were published on the 7th in the international academic journal Nature Sustainability.

All-solid-state lithium metal batteries are regarded as a key direction for the next generation of energy storage technologies. However, the interfacial contact between solid electrolytes and lithium metal electrodes has long been a major bottleneck hindering their commercialization. Conventional approaches rely on bulky external devices to apply continuous pressure, yet significant micro‑pores and cracks still persist at the interface—shortening battery life and posing potential safety risks.

To overcome this challenge, the research team introduced iodide ions into the electrolyte. During battery operation, these iodide ions migrate toward the electrode–electrolyte interface under the influence of the electric field, forming an iodine‑rich interfacial layer. This layer actively attracts lithium ions, spontaneously filling all gaps and pores, thereby ensuring that the electrode and electrolyte remain in close contact at all times.

Tests show that the prototype battery fabricated using this technology maintains stable performance after hundreds of charge–discharge cycles, far surpassing the performance of existing comparable batteries. According to reports, this new design is not only simpler to manufacture and more material‑efficient but also enhances battery durability, holding promise for delivering safer, more efficient energy solutions in fields such as humanoid robotics, electric aviation, and electric vehicles.

Professor Chunsheng Wang of the University of Maryland, a specialist in solid-state batteries, commented: “This research has addressed a critical bottleneck that has long hindered the commercialization of all-solid-state batteries, marking a decisive step toward their practical application.”

[Editor-in-charge: Jiao Peng]

Source: Xinhua Net

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