reprintedSource: Xinhuanet
Xinhua Agency, Beijing, October 7 (Reporter Liu Zhen) The reporter learned from the Institute of Physics, China Academy of Sciences that a research team composed of researcher Huang Xuejie, China Academy of Sciences, and a research team composed of Huazhong University of Science and Technology and Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, have developed an anion regulation technology, which solves the problem of difficult close contact between the electrolyte and the lithium electrode in all-solid metal lithium batteries, and provides key technical support for its practical use. Relevant research results were published in the international academic journal "Nature-Sustainable Development" on the 7th.
All-solid-state metal lithium batteries are regarded as an important development direction for the next generation of energy storage technology. However, the interface contact problem between solid electrolytes and metallic lithium electrodes has always been a difficult problem that restricts its industrialization. Traditional practices rely on heavy external equipment to continuously apply pressure, but there are still a large number of tiny pores and cracks between the lithium electrode and the electrolyte-which not only shortens battery life, but also poses safety hazards.
To solve this dilemma, the research team introduced iodine ions into the electrolyte. When the battery is working, these iodine ions will move to the electrode interface under the action of an electric field, forming an iodine-rich interface. This layer of interface can actively attract lithium ions, automatically fill all the gaps and holes, so that the electrode and electrolyte always keep close contact.
After testing, the prototype battery prepared based on this technology still has stable performance after hundreds of cycles of charge and discharge, far exceeding the level of existing similar batteries. According to reports, this new design not only makes it simpler to manufacture, saves more materials, but also makes batteries more durable, and is expected to bring safer and more efficient energy solutions to humanoid robots, electric aviation, electric vehicles and other fields in the future.
Wang Chunsheng, a professor at the University of Maryland and an expert on solid-state batteries, commented: "This research solves the key bottleneck problem restricting the commercialization of all-solid-state batteries and takes a decisive step towards their practical application."
