Self-Template Synthesis of Prussian Blue Analogue Hollow Polyhedrons as Superior Sodium Storage Cathodes

被引：50

作者：

Huang, Tianbei ^{[1
,2
]}

Niu, Yubin ^{[1
,2
]}

Yang, Qiuju ^{[1
,2
]}

Yang, Wenting ^{[1
,2
]}

Xu, Maowen ^{[1
,2
]}

机构：

[1] Southwest Univ, Sch Mat & Energy, Minist Educ, Key Lab Luminescence Anal & Mol Sensing, Chongqing 400715, Peoples R China

[2] Southwest Univ, Chongqing Key Lab Adv Mat & Clean Energies Techno, Chongqing 400715, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 31期

基金：

中国国家自然科学基金;

关键词：

CoFe-PBA@PDA; self-template; hollow-structured; stability; SIBs; DOPAMINE; NANOCUBES; ELECTRODE; LI;

D O I：

10.1021/acsami.1c09678

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Prussian blue and its analogues with three-dimensional frame structures have been shown to be of great importance in the research and development of sodium-ion batteries (SIBs). Herein, we develop a simple and convenient self-template method to prepare a hollow-structured Prussian blue analogue (CoFePBA). This structure is conducive to buffer the volume changes during ion extraction and insertion processes and shorten the ion diffusion path. When further building a thin polydopamine (PDA) coating, the synthesized CoFe-PBA@PDA exhibits a high discharge capacity of 123.1 mAh g(-1) at 0.1 A g(-1) with a capacity retention of 71.5% after 500 cycles. Moreover, the capacity retention of CoFePBA@PDA after 100 cycles is 14.3% higher than that of the two comparison samples. In addition, the reversible structure of CoFePBA@PDA without forming a new phase was verified by in situ X-ray diffraction. This work may provide another design idea or strategy for improving the stability of the PBA cathodes used in SIBs.

引用

页码：37187 / 37193

页数：7

共 42 条

[1] Dopamine-Melanin Film Deposition Depends on the Used Oxidant and Buffer Solution [J].