Premium
Investigation of the Enhanced Lithium Battery Storage in a Polyoxometalate Model: From Solid Spheres to Hollow Balls
Author(s) -
Liu WenJing,
Yu Ge,
Zhang Mi,
Li RunHan,
Dong LongZhang,
Zhao HuiSi,
Chen YongJun,
Xin ZhiFeng,
Li ShunLi,
Lan YaQian
Publication year - 2018
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800154
Subject(s) - materials science , graphene , composite number , battery (electricity) , lithium (medication) , emi , polyoxometalate , electrode , chemical engineering , lithium ion battery , oxide , nanotechnology , composite material , electrical engineering , electromagnetic interference , chemistry , organic chemistry , metallurgy , catalysis , engineering , physics , medicine , power (physics) , quantum mechanics , endocrinology
Materials with hollow structures are generally considered more conducive to lithium‐ion storage than solid materials, but there is no suitable crystal model system to illustrate it. Herein, it is successfully simulated by utilizing polyoxometalate models to compare the lithium‐ion battery performances. New crystals, EMI‐PMo 12 (EMI: 1‐ethyl‐3‐methylimidazolium) with solid sphere and EMI‐Mo 72 V 30 and EMI‐Mo 132 with hollow structures, are synthesized. In order to increase their electronic conductivity, the composites EMI‐PMo 12 @rGO, EMI‐Mo 72 V 30 @rGO, and EMI‐Mo 132 @rGO (rGO: reduced graphene oxide) can be prepared by introducing rGO. The composite EMI‐Mo 72 V 30 @rGO delivers a reversible capacity of 1145 mAh g −1 at 100 mA g −1 , and the capacity retentions are nearly 100% at 2000 mA g −1 for over 500 cycles. This study not only provides a promising avenue toward manufacturing and developing new‐generation electrode materials in lithium‐ion storage but also proposes a mechanism toward comparing their performances at the molecular level.