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Stable ultrathin lithium metal anode enabled by self-adapting electrochemical regulating strategy

Si-Yuan ZengWen-Long WangDeyuan LiChunpeng YangZi-Jian Zheng

出版	OAE Publishing Inc., 2024-04-08
主題	Science / Energy
URL	http://books.google.com.hk/books?id=3CMAEQAAQBAJ&hl=&source=gbs_api
EBook	SAMPLE

註釋

Ultrathin lithium (Li) metal foils with controllable capacity could realize high-specific-energy batteries; however, the pulverization of Li metal foils due to its extreme volume change results in rapid active Li loss and capacity fading. Here, we report a strategy to stabilize ultrathin Li metal anode via in-situ transferring Li from ultrathin Li foil into a well-designed three-dimensional gradient host during a cycling process. A three-dimensional carbon fiber with gradient distribution of Ag nanoparticles is placed on the ultrathin Li foil in advance and acts as a Li reservoir, guiding Li deposition into its interior and thus alleviating the volume change of ultrathin Li foil anodes. Hence, a high reversibility of Li metal is achieved and Li pulverization is suppressed, which can be witnessed by a long cyclic life in the symmetric cells. The proposed method offers a versatile and facile approach for protecting ultrathin Li metal anodes, which will boost their commercial application process.