• 文献标题:   High energy and power lithium-ion capacitor based on MnO-encased graphene spheres anode and hollow carbon nano-rods cathode
  • 文献类型:   Article
  • 作  者:   XIAO ZH, YU ZQ, AYUB M, LI SP, MA XL, XU CM
  • 作者关键词:   hydrothermal, manganese oxide nanosphere, hollow carbon nanorod, anode, cathode, lithium ion capacitor
  • 出版物名称:   CHEMICAL ENGINEERING SCIENCE
  • ISSN:   0009-2509 EI 1873-4405
  • 通讯作者地址:  
  • 被引频次:   4
  • DOI:   10.1016/j.ces.2021.116968 EA JUL 2021
  • 出版年:   2021

▎ 摘  要

High energy density, high power density and long lifespan lithium-ion capacitors (LICs) are increasing required in many electronic devices. However, the mismatch of capacity severely hinders the practical applications of LICs. Herein, hollow MnO@graphene nano-spheres (MnO@G-NS) are prepared by a high temperature calcination treatment of the hydrothermally-synthesized MnCO3-C spheres. The MnO@GNS anode shows high capacity, outstanding rate performance (504 mAh g(-1) at 3 A g(-1)), high initial coulombic efficiency (83.6%) and long lifespan cyclic stability. Meanwhile, S, N-codoped hollow carbon nano-rods (SNHCs) are obtained via a template-free calcination process. As the cathode, SNHCs displays high capacitiy, excellent rate capability (165 mAh g(-1) at 10 A g(-1)) and ultralong cycling stability for 5000 cycles. Furthermore, MnO@G-NS//SNHCs is assembled by MnO@G-NS anode and SNHCs cathode, and delivers high energy density (126.7 Wh kg(-1)), high power density (5722 W kg(-1)) and long-term cycling stability for 10,000 cycles. Furthermore, a highly loaded (18 mg cm(-2)) LICs still delivered a high energy density of 111 Wh kg(-1) at 999.4 W kg(-1), and a higher power density of 5095.1 W kg(-1) at 63.7 Wh kg(-1) coupled with 81% capacity retention for 10,000 cycles at 10 A g(-1), indicating a great application potential in LICs. (C) 2021 Elsevier Ltd. All rights reserved.