<scp>Vacancy–vacancy</scp> pairs induced new phase formation in carbon boride: A design principle to achieve superior performance Li/Na‐ion battery anodes
Yaru Wei, Baocheng Yang, Shuaiwei Wang, Donghai Wu, Shouren Zhang, Houyang Chen, Eli Ruckenstein
Abstract
Abstract Defect engineering is a desired manner to promote the performance of electrodes. Herein, by employing the boron atom substitution and carbon–boron vacancy–vacancy pairs in graphene, a defect‐induced two‐dimensional new phase, popC 5 B, is formed. The evidences indicate that it has dynamic, thermal, and mechanical stabilities. When used as anodes in Li/Na‐ion batteries, it possesses high theoretical specific capacities of 1891/1135 mAh/g. The high capacity is attributed to the synergy effect of various defect engineering and defect‐induced phase transition that lead to the charge delocalization in popC 5 B and promote the electron transfer between metal ions and popC 5 B. This study demonstrates that the synergy effect of various kinds of defects could be an effective approach to acquire high performance electrodes in batteries. image