SnO2 Nanoflake Arrays Coated with Polypyrrole on a Carbon Cloth as Flexible Anodes for Sodium-Ion Batteries

Minya Wang; Xiuli Wang; Zhujun Yao; Wangjia Tang; Xinhui Xia; Changdong Gu; Jiangping Tu

doi:10.1021/acsami.9b08378

SnO₂ Nanoflake Arrays Coated with Polypyrrole on a Carbon Cloth as Flexible Anodes for Sodium-Ion Batteries

ACS Appl Mater Interfaces. 2019 Jul 10;11(27):24198-24204. doi: 10.1021/acsami.9b08378. Epub 2019 Jun 27.

Authors

Minya Wang¹, Xiuli Wang¹, Zhujun Yao¹, Wangjia Tang¹, Xinhui Xia¹, Changdong Gu¹, Jiangping Tu¹

Affiliation

¹ State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China.

PMID: 31199106
DOI: 10.1021/acsami.9b08378

Abstract

SnO₂ has been extensively studied as an anode material for sodium-ion batteries, which, however, has long been subjected to poor conductivity and large volume expansion accompanied with an unsatisfactory electrochemical performance. Here, novel interlaced SnO₂ nanoflakes are synthesized directly on a carbon cloth collector via hydrothermal and annealing treatment and then coated with polypyrrole (PPy) via electrodeposition. The as-prepared flexible SnO₂@PPy on the carbon cloth exhibits a high initial capacity of 1172.1 mAh g^-1 and an outstanding cycling stability with 85% capacity retention after 300 cycles at 0.1 A g^-1, which can be contributed to the interlaced SnO₂ nanoflakes as well as the coating of PPy. This result shows promising potential for construction of an electrode in high-performance energy storage fields.

Keywords: anode; conducting polymer; freestanding; lamellar SnO; sodium-ion battery.