Journal
ACS NANO
Volume 15, Issue 9, Pages 14697-14708Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c04493
Keywords
potassium-ion batteries; anode material; doping engineering; mechanical stress; synchrotron X-ray tomography
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Funding
- National Natural Science Foundation of China [22075063, U1932205]
- Joint Fund for Scientific Research of Large Scientific Installations [U2032133]
- Natural Science Funds of Heilongjiang Province [ZD2019B001]
- Heilongjiang Touyan Team [HITTY20190033]
- Harbin Institute of Technology (HIT)
- Chongqing Research Institute of HIT
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By modulating the electronic structure, it is possible to alleviate internal strain caused by potassium ions and improve the structural stability of battery anodes, providing a new pathway towards highly stable potassium ion batteries.
Atomic-level structure engineering is an effective strategy to reduce mechanical degradation and boost ion transport kinetics for battery anodes. To address the electrode failure induced by large ionic radius of K+ ions, herein we synthesized Mn-doped ZnSe with modulated electronic structure for potassium ion batteries (PIBs). State-of-the-art analytical techniques and theoretical calculations were conducted to probe crystalline structure changes, ion/electron migration pathways, and micromechanical stresses evolution mechanisms. We demonstrate that the heterogeneous adjustment of the electronic structure can relieve the potassiumization-induced internal strain and improve the structural stability of battery anodes. Our work highlights the importance of the correlation between doping chemistry and mechanical stability, inspiring a pathway of structural engineering strategy toward a highly stable PIBs.
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