Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi'an Jiaotong University , Xi'an 710049, China.
Shaanxi Engineering Research Center of Advanced Energy Materials & Devices, Xi'an Jiaotong University , Xi'an 710049, China.
ACS Appl Mater Interfaces. 2016 Jun 22;8(24):15598-606. doi: 10.1021/acsami.6b03332. Epub 2016 Jun 13.
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.
氧化锡（SnO2）作为锂离子电池（LIBs）的阳极，由于其巨大的锂离子存储容量而引起了广泛关注。然而，SnO2在充放电过程中的体积变化超过 300%，导致其电化学性能急剧下降，循环稳定性较差，从而阻碍了其在 LIBs 中的应用。在这里，提出了一种新的策略，通过将介孔 SnO2锚定在坚固的聚苯胺纳米管（PPy NTs）上来抑制这种体积变化，从而制备出纳米结构的 SnO2复合材料。得益于这种纳米结构设计，该阳极具有出色的倍率性能，在 2000 mA g-1 时的可逆比容量约为 770 mA h g-1，在 200 mA g-1 时经过 200 次循环后具有显著的循环稳定性，比容量约为 790 mA h g-1。
