首页|Constructing highly safe and long-life calcium ion batteries based on hydratedvanadium oxide cathodes featuring a pillar structure

Constructing highly safe and long-life calcium ion batteries based on hydratedvanadium oxide cathodes featuring a pillar structure

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Calcium-ion batteries(CIBs)have generated intense interest due to the growing demand for safer,cheaper,and large-scale energy storage systems.However,their development is still in its infancy,owing to the lack of suitable cathodes for sustaining reversible Ca2+intercala-tion/deintercalation.Herein,layered H2V3O8(HVO)with Zn2+pre-insertion(ZHVO)is reported as a high-rate and highly durable cathode material for CIBs.The existence of Zn2+and H2O pillars could expand the interlayer spacing up to 1.8 nm,which is favorable for the diffusion of bulky Ca2+.The formation of Zn-O bonds facilitates electron transfer and enhances electrical conduction.Consequently,the ZHVO cathode achieves superior capacity performance(213.9 mAh·g-1 at 0.2 A·g-1)and long lifespan(78.3％for 1,000 cycles at 5 A·g-1)compared to pristine HVO.Density functional theory(DFT)calculations revealed that Zn2+moved during Ca2+intercalation,thereby reducing the diffusion energy barrier and facilitating Ca2+diffusion.Finally,a safe aqueous calcium ion cell was successfully assembled.

Multivalent batteriesCalcium-ion batteriesLayered structureVanadium oxideCathode materials

Chun-Fang Wang、Shi-Wei Zhang、Lan Huang、Yuan-Min Zhu、Feng Liu、Jian-Chuan Wang、Li-Ming Tan、Chun-Yi Zhi、Cui-Ping Han

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Powder Metallurgy Research Institute,Central South University,Changsha 410083,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

Research Institute of Interdisciplinary Science and School of Materials Science and Engineering,Dongguan University of Technology,Dongguan 523808,China

Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong 999077,China

Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China

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Open Research Found of Songshan Lake Materials Laboratory国家自然科学基金国家自然科学基金Guangdong Basic and Applied Basic Research FoundationOutstanding Youth Basic Research Project of Shenzhen

2021SLABFN0422109134521710252022A1515010920RCYX20221008092934093

2024

10.1007/s12598-023-02613-5

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(6)
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