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author:

Han, Lijing (Han, Lijing.) [1] | Zhao, Andi (Zhao, Andi.) [2] | Tang, Jing (Tang, Jing.) [3] | Wei, Qiaohua (Wei, Qiaohua.) [4] | Wei, Mingdeng (Wei, Mingdeng.) [5]

Indexed by:

EI

Abstract:

A composite of two-dimensional (2D) GeSe2 nanosheets dispersed on N-doped reduced graphene oxide (GeSe2/N-rGO) is fabricated via a simple hydrothermal method combined with post-selenization process. The high electronic conductivity and the substantial void spaces of the wrinkled N-rGO can improve the electrical conductivity of the active material and accommodate the volume evolution of GeSe2 nanosheets during the (de)lithiation processes, while GeSe2 nanosheets can reduce ion diffusion length effectively. Meanwhile, the unique layered structure is beneficial to the contact of the active material and electrolyte, and the reversibility of conversion reaction has also been improved. Furthermore, kinetics analysis reveals a pseudocapacitance-dominated Li+-storage mechanism at high rates. In-situ X-ray diffraction analysis discloses that the conversion reaction has played a certain part in Li+-storage. Thus, the GeSe2/N-rGO composite delivers excellent rate capability and good long-term stability with a high reversible capacity of 711.0 mA h g−1 after 2000 cycles at 1 A g−1. © 2022 Wiley-VCH GmbH.

Keyword:

Doping (additives) Electric conductivity Electrolytes Germanium compounds Graphene Ions Lithium-ion batteries Nanosheets Selenium compounds Storage (materials) X ray diffraction X ray powder diffraction

Community:

  • [ 1 ] [Han, Lijing]Fujian Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 2 ] [Han, Lijing]Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 3 ] [Zhao, Andi]Fujian Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 4 ] [Tang, Jing]Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 5 ] [Wei, Qiaohua]Fujian Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 6 ] [Wei, Qiaohua]Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 7 ] [Wei, Mingdeng]Fujian Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 8 ] [Wei, Mingdeng]Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Jiangsu, Changzhou; 213164, China

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Source :

Chemistry - A European Journal

ISSN: 0947-6539

Year: 2022

Issue: 36

Volume: 28

4 . 3

JCR@2022

3 . 9 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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