我国团队突破锂电池领域关键技术瓶颈

Core Insights - A research team from the Chinese Academy of Sciences, in collaboration with Huazhong University of Science and Technology and Ningbo Institute of Materials Technology and Engineering, has developed an anion regulation technology that creates a new interface between the electrode and electrolyte, overcoming a major bottleneck in the practical application of all-solid-state batteries [1] - All-solid-state lithium batteries are considered the "holy grail" of next-generation energy storage technology, but have faced challenges due to the need for tight contact between solid electrolytes and lithium electrodes, traditionally requiring heavy external pressure [1] - The research identified that the contact between lithium electrodes and electrolytes in all-solid-state batteries is suboptimal, with numerous micro-pores and cracks that can shorten battery life and pose safety risks [1] Technology Development - The new technology involves introducing iodine ions into the sulfide electrolyte, which migrate to the electrode interface under electric field influence, forming an iodine-rich interface that actively attracts lithium ions [1] - This interface acts like a "self-repairing" mechanism, automatically filling gaps and pores to maintain tight contact between the electrode and electrolyte [1] Performance Results - Prototype batteries made using this technology have shown stable and superior performance after hundreds of charge-discharge cycles under standard testing conditions, significantly exceeding the performance levels of existing similar batteries [2]