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Transformation of Rusty Stainless‐Steel Meshes into Stable, Low‐Cost, and Binder‐Free Cathodes for High‐Performance Potassium‐Ion Batteries
Author(s) -
Zhu Yunhai,
Yin Yanbin,
Yang Xu,
Sun Tao,
Wang Sai,
Jiang Yinshan,
Yan Junmin,
Zhang Xinbo
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201702711
Subject(s) - materials science , cathode , electrochemistry , prussian blue , electrode , chemical engineering , graphite , oxide , stack (abstract data type) , composite material , metallurgy , chemistry , computer science , engineering , programming language
To recycle rusty stainless‐steel meshes (RSSM) and meet the urgent requirement of developing high‐performance cathodes for potassium‐ion batteries (KIB), we demonstrate a new strategy to fabricate flexible binder‐free KIB electrodes via transformation of the corrosion layer of RSSM into compact stack‐layers of Prussian blue (PB) nanocubes (PB@SSM). When further coated with reduced graphite oxide (RGO) to enhance electric conductivity and structural stability, the low‐cost, stable, and binder‐free RGO@PB@SSM cathode exhibits excellent electrochemical performances for KIB, including high capacity (96.8 mAh g −1 ), high discharge voltage (3.3 V), high rate capability (1000 mA g −1 ; 42 % capacity retention), and outstanding cycle stability (305 cycles; 75.1 % capacity retention).