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Electrochemical Performance and Storage Mechanism of Ag 2 Mo 2 O 7 Micro‐rods as the Anode Material for Lithium‐Ion Batteries
Author(s) -
Zhang Meina,
Gao Yu,
Chen Nan,
Ge Xin,
Chen Hong,
Wei Yingjin,
Du Fei,
Chen Gang,
Wang Chunzhong
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201700281
Subject(s) - anode , electrochemistry , materials science , lithium (medication) , cyclic voltammetry , electrode , amorphous solid , chemical engineering , molybdenum , faraday efficiency , inorganic chemistry , metallurgy , chemistry , crystallography , medicine , engineering , endocrinology
Ag 2 Mo 2 O 7 micro‐rods are prepared by one‐step hydrothermal method and their lithium electrochemical properties, as the anode for lithium‐ion batteries, are comprehensively studied in terms of galvanostatic charge–discharge cycling, cyclic voltammetry, and rate performance measurements. The electrode delivers a high reversible capacity of 825 mAh g −1 at a current density of 100 mA g −1 and a superior rate capability with a discharge capacity of 263 mAh g −1 under the high current density of 2 Ag −1 . The structural transition and phase evolution of Ag 2 Mo 2 O 7 were investigated by using ex situ XRD and TEM. The Ag 2 Mo 2 O 7 electrode is likely to be decomposed into amorphous molybdenum, Li 2 O, and metallic silver based on the conversion reaction. Silver nanoparticles are not involved in the subsequent electrochemical cycles to form a homogeneous conducting network. Such in situ decomposition behavior provides an insight into the mechanism of the electrochemical reaction for the anode materials and would contribute to the design of new electrode materials in future.