Confined Element Distribution with Structure‐Driven Energy Coupling for Enhanced Prussian Blue Analogue Cathode

• DOI: 10.1002/ange.202410420
• Publication Date: 2024-07-04T06:10:17Z
• Authors: Xinyu Hu; Weishun Jian; Ningyun Hong; Xue Zhong; Mushi Yang; Shusheng Tao; Jiangnan Huang; Haoji Wang; Jingqiang Gao; Wentao Deng; Guoqiang Zou; Hongshuai Hou; Debbie S. Silvester; Craig E. Banks; Xiaobo Ji
• Keywords: Prussian blue

Abstract The structural failure of Na 2 Mn[Fe(CN) 6 ] could not be alleviated with traditional modification strategies through the adjustable composition property Prussian blue analogues (PBAs), considering that accumulation and release stress derived from MnN octahedrons are unilaterally restrained. Herein, a novel application property, constructing coordination competition relationship between chelators [Fe(CN) 4− to directionally tune enrichment elements, is proposed restrain degradation induce unconventional energy coupling phenomenon. non‐uniform distribution elements at M 1 site PBAs (NFM‐PB) manipulated by sequentially precipitated Ni, Fe, Mn according Irving‐William order. Electrochemically active Fe operated accompany Mn, zero‐strain Ni modulated enrich surface, synergistically mitigating then significantly improving stability. Furthermore, effect, fusion electrochemical behavior LS HS , triggered confined element distribution, leading enhanced stability anti‐polarization ability. Consequently, NFM‐PB demonstrates superior rate performance cycling These findings further exploit potentialities provide new insights into component design engineering for advanced PBAs.