Utilizing an autogenously protective atmosphere to synthesize a Prussian white cathode with ultrahigh capacity-retention for potassium-ion batteries

Jiahui Dong; Yu Lei; Da Han; Huwei Wang; Dengyun Zhai; Baohua Li; Feiyu Kang

doi:10.1039/c9cc06248c

Utilizing an autogenously protective atmosphere to synthesize a Prussian white cathode with ultrahigh capacity-retention for potassium-ion batteries

Chem Commun (Camb). 2019 Oct 15;55(83):12555-12558. doi: 10.1039/c9cc06248c.

Authors

Jiahui Dong¹, Yu Lei¹, Da Han², Huwei Wang³, Dengyun Zhai², Baohua Li², Feiyu Kang¹

Affiliations

¹ Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-Based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China. [email protected] and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
² Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-Based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China. [email protected].
³ Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China.

PMID: 31576844
DOI: 10.1039/c9cc06248c

Abstract

A facile, low-cost precipitation method, utilizing an autogenously protective atmosphere without the assistance of an inert atmosphere, is proposed to synthesize nano-sized Prussian white K1.62Fe[Fe(CN)6]0.92·0.33H2O. The cathode delivers a high capacity of 120.9 mA h g-1 at 50 mA g-1 and an ultrahigh capacity retention of 98.2% after 100 cycles.