期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 12, 页码 16121-16129出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b02758
关键词
Prussian blue analogue; Sodium-ion battery; Cathode material; Sodium manganese hexacyanoferrate; Electrochemical performance
资金
- National Natural Science Foundation of China [51572238]
- Science and Technology Project of State Grid [SGRIDGKJ[2017]328]
- Strategic Emerging Industry Project of Hunan Province, China [2016GK4030]
Prussian blue analogues (PBA) recently have received great interest for promising applications in low-cost sodium-ion batteries (SIBs). However, controlled synthesis of high-performance PBA is still challenging. In this work, a facile precipitation route was used to synthesize Na-rich PBAs with superior electrochemical performance. It was found that two shapes of the products, namely, small irregular particles and large cuboid particles, coexist by adding sodium citrate in the sodium hexacyanoferrate side during the synthesis. The product shows large capacity (144 mAh g(-1) under a 0.1 C rate), good rate performance (115.6 mAh g(-1) under a 1 C rate, 86.6 mAh g(-1) under a 10 C rate), and long-term cycling stability (73.4% retention after 780 cycles under a 0.5 C rate, 72.7% retention after 2100 cycles under a 1 C rate). This work offers a promising route to prepare PBA-based cathode materials for high-performance SIBs.
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