文献类型：期刊文献

英文题名：High-Capacitance γ-rGO/MXene Cathode and Rapid Na+-Transfer Dynamics Sodium Titanate Anode for a Quasi-Solid-State Sodium-Ion Capacitor

作者：Chen, Jin[1]; Sun, Ming[1]; Zhang, Yifan[1]; Wang, Wenqiang[1]; Wang, Gengchao[1]

机构：[1] Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

卷号：6

期号：8

起止页码：4179

外文期刊名：ACS Applied Energy Materials

收录：EI(收录号：20231513884957)

语种：英文

外文关键词：Anodes - Capacitance - Cathodes - Graphene - Metal ions - Sodium compounds - Sodium-ion batteries

摘要：Sodium-ion capacitors (SICs) bear the advantages of secondary batteries and supercapacitors and are regarded as promising energy-storage devices. However, the matching of the respective Na+-transfer kinetics of the anode and the cathode and the low energy density are still a challenge. Herein, to achieve a high-capacity cathode, 2D V2C MXene nanosheets were introduced into γ-ray-reduced graphene oxide (γ-rGO), and the γ-rGO/V2C MXene foam (GMF) was fabricated. The GMF provides a high specific capacitance of 391.4 mF cm-2 (130.5 F g-1) at a high current density of 60 mA cm-2 (20 A g-1). Meanwhile, the structure-directing strategy combining multiple nanocarbon composites accelerates the Na+-transfer kinetics of sodium titanate (NTO). The as-fabricated CNT film-supported sodium titanate nanowires encapsulated by the graphene (CNTF@NTO-G) anode deliver a specific capacity of 109 mA h g-1 at a high current density of 10 A g-1. As a result, the assembled quasi-solid-state SIC displays an energy density of 5.61 mW h cm-3 (56.1 W h kg-1) at a power density of 1 W cm-3 (10 kW kg-1) with excellent cycle stability (87.3% capacitance retention after 10,000 cycles). ? 2023 American Chemical Society.