材料科学
石墨烯
阳极
电化学
钠离子电池
阴极
离子
插层(化学)
钠
电流密度
电池(电)
氧化物
锂(药物)
石墨
纳米技术
碳纤维
化学工程
复合材料
无机化学
电极
复合数
有机化学
电气工程
冶金
医学
化学
量子力学
内分泌学
法拉第效率
工程类
功率(物理)
物理
物理化学
作者
Ping Li,Jongtae Jeong,Bingjun Jin,Kan Zhang,Jae Hyung Park
标识
DOI:10.1002/aenm.201703300
摘要
Abstract Inspired by the great success of graphite in lithium‐ion batteries, anode materials that undergo an intercalation mechanism are considered to provide stable and reversible electrochemical sodium‐ion storage for sodium‐ion battery (SIB) applications. Though MoS 2 is a promising 2D material for SIBs, it suffers from deformation of its layered structure during repeated intercalation of Na + , resulting in undesirable electrochemical behaviors. In this study, vertically oriented MoS 2 on nitrogenous reduced graphene oxide sheets (VO‐MoS 2 /N‐RGO) is presented with designed spatial geometries, including sheet density and height, which can deliver a remarkably high reversible capacity of 255 mA h g −1 at a current density of 0.2 A g −1 and 245 mA h g −1 at a current density of 1 A g −1 , with a total fluctuation of 5.35% over 1300 cycles. These results are superior to those obtained with well‐developed hard carbon structures. Furthermore, a SIB full cell composed of the optimized VO‐MoS 2 /N‐RGO anode and a Na 2 V 3 (PO 4 ) 3 cathode reaches a specific capacity of 262 mA h g −1 (based on the anode mass) during 50 cycles, with an operated voltage range of 2.4 V, demonstrating the potentially rewarding SIB performance, which is useful for further battery development.
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