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A High‐Performance Dual‐Ion Battery Enabled by Conversion‐Type Manganese Silicate Anodes with Enhanced Ion Accessibility
Author(s) -
Hao ShuMeng,
Qu Jin,
Chang Wei,
Zhang YuJiao,
Tang Yongbing,
Yu ZhongZhen
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801675
Subject(s) - anode , materials science , diffusion , electrochemistry , manganese , electrode , chemical engineering , lithium (medication) , ion , battery (electricity) , intercalation (chemistry) , inorganic chemistry , chemistry , metallurgy , thermodynamics , medicine , power (physics) , physics , organic chemistry , engineering , endocrinology
Limited by the sluggish kinetics of conversion‐type anodes from huge diffusion‐controlled phase transformation and unsatisfactory capacities of intercalation/alloy‐type anodes, the performances of lithium‐based dual ion batteries (LDIBs) remain to be promoted. Herein, for the first time, ultra‐small manganese silicate (MS) nanosheets anchored on reduced graphene oxides (MSR) with enhanced diffusion kinetics are constructed, realizing the construction of high performance LDIBs on the basis of conversion‐type anodes. The ion diffusion rate of MSR is promoted by in situ coating Li 4 SiO 4 ionic conductor on the electrode surface during lithiation process. Simultaneously, the ion diffusion pathways are shortened by partially converting the diffusion‐controlled bulk reaction to surface reaction with massive pseudocapacitive contribution. Consequently, the MSR‐based LDIB exhibits superior electrochemical performances with discharge capacities of 191 mA h g −1 at 0.5 C and 128 mA h g −1 at 2 C after 150 cycles, exceeding to those of reported LDIBs and benefiting the future electrode design of LDIBs.