物理化学学报2017，Vol.33Issue(8)：1621-1627,7.DOI:10.3866/PKU.WHXB201704191
SnS2纳米花/石墨烯纳米复合物的一步法合成及其增强的锂离子存储性能
One-Step Synthesis of SnS2 Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance
摘要
Abstract
SnS2 is considered as an attractive anode material to substitute commercial graphite anodes of lithium-ion batteries due to its high specific capacity of 645 mAh·g-1 as well as low cost.Nevertheless,it suffers poor large volume expansion during the lithiation/delithiation processes,leading to the loss of electrical contact and rapid capacity fading.Herein,by using a facile one-step solvothermal method,SnS2 nanoflower/graphene nanocomposites (SnS2 NF/GNs) were prepared,where flower-like SnS2 hierarchical nanostructures consisting of ultrathin nanoplates,are tightly enwrapped in graphene nanosheets.As anode materials for lithium-ion batteries,the SnS2 NF/GNs electrode exhibit superior electrochemical performance,with a reversible capacity of 523 mAh·g-1 after 200 charge-discharge cycles.The enhanced Li storage performance was attributed to the synergistic effect of SnS2 and graphene.The SnS2 NF can effectively accommodate the volume change and shorten Li+ diffusion distance,while graphene nanosheets can further alleviate the volume expansion of SnS2 and improve the electronic conductivity.关键词
锂离子电池/负极/SnS2纳米花/石墨烯Key words
Lithium-ion battery/Anode/SnS2 nanoflower/Graphene分类
化学化工引用本文复制引用
田爱华,魏伟,瞿鹏,夏修萍,申琦..SnS2纳米花/石墨烯纳米复合物的一步法合成及其增强的锂离子存储性能[J].物理化学学报,2017,33(8):1621-1627,7.基金项目
The project was supported by the National Natural Science Foundation of China (21575131) and the Key Scientific Research Project of High Schools in Henan Province (16A430025,17A480009).国家自然科学基金(21575131)和河南省高等学校重点科研项目(16A430025,17A480009)资助 （21575131）
