A Hybrid Energy Storage Mechanism of Zinc Hexacyanocobaltate-Based Metal？Organic Framework Endowing Stationary and High-Performance Lithium-Ion Storage
- A Hybrid Energy Storage Mechanism of Zinc Hexacyanocobaltate-Based Metal？Organic Framework Endowing Stationary and High-Performance Lithium-Ion Storage
- 최지원; 장개강; 이태형; 장호원; Mohammadreza Shokouhimehr
- Cathode; Coulombic efficiency; Lithium-ion battery; Prussian blue analogs; Zinc hexacyanocobaltate
- Issue Date
- Electronic materials letters
- VOL 15, NO 4-453
- Lithium-ion batteries (LIBs) are considered to be theoretically promising with regard to large-scale energy storage and conversion systems. However, a significant problem is the lack of cost-efficient high-performance cathode materials for LIBs. In this study, we demonstrate a Prussian blue analog, zinc hexacyanocobaltate (ZnHCCo), as the low-cost and high-performance
cathode material for LIBs. The open-framework crystal structure of ZnHCCo contributes toward reversible cation insertion and extraction along with the spontaneous valence change of hosts. Specifically, the as-prepared ZnHCCo exhibits a highly reversible capacity of 121.5 mAh g− 1 at a current density of 1.25 C, a superior rate capability of 60.5 mAh g− 1 at 6.25 C, and a stable cycling stability with a Coulombic efficiency of 96.5%. Therefore, the well-crystallized and low-cost ZnHCCo is expected to be a potential cathode material for LIBs used in grid-scale energy storage and conversion systems. In addition, the synthesis process of the electrode material can be readily up scaled using the earth abundant and environmentally benign precursors via a room-temperature wet-chemical method.
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