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author:

Han, Lijing (Han, Lijing.) [1] | Zhao, Andi (Zhao, Andi.) [2] | Tang, Jing (Tang, Jing.) [3] (Scholars:汤儆) | Wei, Qiaohua (Wei, Qiaohua.) [4] (Scholars:魏巧华) | Wei, Mingdeng (Wei, Mingdeng.) [5] (Scholars:魏明灯)

Indexed by:

EI Scopus SCIE

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).

Keyword:

electrochemical property GeSe2 in situ XRD measurement lithium-ion battery N-rGO reversible conversion reaction

Community:

  • [ 1 ] [Han, Lijing]Fuzhou Univ, Fujian Key Lab Electrochem Energy Storage Mat, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Zhao, Andi]Fuzhou Univ, Fujian Key Lab Electrochem Energy Storage Mat, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Wei, Qiaohua]Fuzhou Univ, Fujian Key Lab Electrochem Energy Storage Mat, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Wei, Mingdeng]Fuzhou Univ, Fujian Key Lab Electrochem Energy Storage Mat, Fuzhou 350116, Fujian, Peoples R China
  • [ 5 ] [Han, Lijing]Fuzhou Univ, Key Lab Analyt Sci Food Safety & Biol, Fujian Key Lab Anal & Detect Technol Food Safety, Minist Educ, Fuzhou 350116, Fujian, Peoples R China
  • [ 6 ] [Tang, Jing]Fuzhou Univ, Key Lab Analyt Sci Food Safety & Biol, Fujian Key Lab Anal & Detect Technol Food Safety, Minist Educ, Fuzhou 350116, Fujian, Peoples R China
  • [ 7 ] [Wei, Qiaohua]Fuzhou Univ, Key Lab Analyt Sci Food Safety & Biol, Fujian Key Lab Anal & Detect Technol Food Safety, Minist Educ, Fuzhou 350116, Fujian, Peoples R China
  • [ 8 ] [Wei, Mingdeng]Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolta Sci & E, Changzhou 213164, Jiangsu, Peoples R 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 Discipline: CHEMISTRY;

ESI HC Threshold:74

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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