Enabling High Performance Calcium-Ion Batteries from Prussian Blue and Metal-Organic Compound Materials
- Authors
- Thuan Ngoc Vo; Hur, Jaehyun; Kim, Il Tae
- Issue Date
- Feb-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Calcium-ion batteries; Prussian blue; Metal-organic compound; Nickel derivative; Hydrolysis
- Citation
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.8, no.7, pp.2596 - 2601
- Journal Title
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING
- Volume
- 8
- Number
- 7
- Start Page
- 2596
- End Page
- 2601
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/26108
- DOI
- 10.1021/acssuschemeng.9b07374
- ISSN
- 2168-0485
- Abstract
- Full cell calcium-ion batteries (CIBs) were fabricated from Prussian blue and metal-organic compound (MOC) materials and characterized. The anode materials were prepared via the simple precipitation of a nickel salt and various organic sodium salts (C6H6-x-y(COONa)(x)(NH2)(y)). The OH vibration in FTIR results indicated the partial hydrolysis of Ni-based MOCs during the synthesis. Particularly, the addition of NH2 groups in the ligand increased the steric hindrance; thus, the partial hydrolysis of the Ni-based MOC was inhibited. When the anode material was a partially hydrolyzed MOC (Ni(OH)-[C6H4(COOH)(COO)]), the full cell gave an initial discharging capacity of 82 mAh g(-1) and a capacity retention of 62% at 0.1 A g(-1) after 100 cycles, while the Coulombic efficiency was maintained at approximately 95.4%. The cell obtained from an NH2-functionalized MOC (Ni[C6H4(NH2)(COO)(2)]) delivered an initial discharging capacity of 86 mAh g(-1) and a capacity retention of 77% at 0.1 A g(-1) after 100 cycles, while the Coulombic efficiency was maintained at approximately 97%. The impedance tests suggested that Ni-based MOCs had typically low resistance, which is essential to achieve stable full cell CIBs.
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