Microwave-Assisted Synthesis of SnO2@polypyrrole Nanotubes and Their Pyrolyzed Composite as Anode for Lithium-Ion Batteries

详细信息    查看全文

• 作者：Xianfeng Du ; Tongjia Yang ; Jun Lin ; Tianyu Feng ; Jianbo Zhu ; Lu Lu ; Youlong Xu ; Jingping Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 22, 2016
• 年：2016
• 卷：8
• 期：24
• 页码：15598-15606
• 全文大小：686K
• 年卷期：0
• ISSN：1944-8252

文摘

Tin dioxide (SnO₂) as lithium-ion batteries (LIBs) anode has attracted numerous interests due to its huge Li⁺ storage capacity. However, more than 300% volume variation of SnO₂ during the charge/discharge process results in dramatic degradation of electrochemical performance and thus poor cyclic stability, which has hindered its application in LIBs. Here, a new strategy is proposed to suppress this volume change via anchoring mesoporous SnO₂ on robust polypyrrole nanotubes (PPy NTs) to fabricate nanoarchitectured SnO₂ composite. Benefiting from this nanoarchitecture design, the anode presents outstanding rate performance with a reversible specific capacity of about 770 mA h g^–1 at 2000 mA g^–1 and remarkable cyclability accompanied by a high specific capacity of about 790 mA h g^–1 at 200 mA g^–1 after 200 cycles.