期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 7, 页码 2596-2601出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b07374
关键词
Calcium-ion batteries; Prussian blue; Metal-organic compound; Nickel derivative; Hydrolysis
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2018R1A1A1A05018332]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20194030202290]
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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