通过缺陷工程提高石墨的锂/钠存储性能。
Boosting Li/Na storage performance of graphite by defect engineering.
作者信息
Ou Mingyang, Sun Shixiong, Liu Yi, Xu Yue, Chen Chang, Hu Pei, Fang Chun, Li Qing, Han Jiantao
机构信息
State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 P. R. China.
State Environmental Protection Key Laboratory of Soil Health and Green Remediation Wuhan 430070 P. R. China.
出版信息
RSC Adv. 2021 Jun 24;11(36):22297-22304. doi: 10.1039/d1ra03102c. eCollection 2021 Jun 21.
Regulating material properties by accurately designing its structure has always been a research hotspot. In this study, by a simple and eco-friendly mechanical ball milling, we could successfully engineer the defect degree of the graphite. Moreover, according to the accurate deconstruction of the structure by atomic pair distribution function analysis (PDF) and X-ray absorption near-edge structure analysis (XANES), those structural defects of the ball-milled graphite (BMG) mainly exist as carbon atom vacancies within the graphene structure, which are beneficial to enhance the lithium and sodium storage performance of BMG. Therefore, BMG-30 h exhibits superior lithium and sodium storage performance.
通过精确设计材料结构来调控其性能一直是研究热点。在本研究中，通过简单且环保的机械球磨，我们能够成功调控石墨的缺陷程度。此外，根据通过原子对分布函数分析（PDF）和X射线吸收近边结构分析（XANES）对结构的精确解构，球磨石墨（BMG）的那些结构缺陷主要以石墨烯结构内的碳原子空位形式存在，这有利于提高BMG的锂和钠存储性能。因此，BMG - 30 h表现出优异的锂和钠存储性能。
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