文献类型：期刊文献

英文题名：Introducing the Solvent Co-Intercalation Mechanism for Hard Carbon with Ultrafast Sodium Storage

作者：Jiang, Nan[1];Chen, Long[1];Jiang, Hao[1];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Environm Friendly Mat Tech Serv Platform, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：18

期号：15

外文期刊名：SMALL

收录：;EI(收录号：20220911732452);WOS:【SCI-EXPANDED(收录号:WOS:000762216800001)】；

基金：This work was supported by the National Natural Science Foundation of China (21978088, 91534202, and 51673063), Program of Shanghai Academic/Technology Research Leader (20XD1433600), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning, and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：hard carbons; power density; sodium-ion batteries

摘要：As the most successful anode material for sodium-ion batteries, hard carbon has attracted extensive attention from researchers. However, its storage mechanism is still controversial. In this paper, a solvent co-intercalation mechanism into hard carbon is proposed and is proved by in situ XRD and ex situ TEM XPS results successfully. Thanks to the co-intercalation of solvent, the platform capacity of hard carbon maintains well at very high current densities. It can even exhibit 245 mAh g(-1) at 5 A g(-1), which is the best rate performance obtained for hard carbon anode as far as it is known. The full battery assembled with Na3V2(PO4)(3) has a high energy density of 157 Wh kg(-1) at 3800 W kg(-1) (relative to the electrode). This finding brings new insights with regard to the design of hard carbon materials and sodium storage mechanisms.