| 论文题目 | Reconstructed Orthorhombic V2O5 Polyhedra for Fast Ion Diffusion in K-ion Batteries |
| 作 者 | Yun-Hai Zhu; Qi Zhang,Xu Yang,En-Yue Zhao,Tao Sun,Xin-Bo Zhang,Sai Wang,Xi-Qian Yu,Qing Jiang |
| 发表年度 | 2019 |
| 刊物名称 | Chem |
| 卷、期、页码 | ; 1; 168-179 |
| 影响因子 | |
| 论文摘要 | Potassium-ion batteries (KIBs) are a promising alternative to lithium-ion batteries because of the abundance, low cost, and redox potential of K; however, the significantly larger radius of K+ inevitably destabilizes the crystal structure of the cathode material, impeding the diffusion of K+. Here, to lower the insertion energetics and diffusion barriers of K+, we synthesizedδ-K0.51V2O5 nanobelts (KVOs) with a large interlayered structure and optimized growth orientation by reconstructing the V–O polyhedra of orthorhombic V2O5; these exhibited a high average voltage (3.2 V), high capacity (131 mAh g？1), and superior rate capability even at 10 A g？1. By coupling the electrochemical experiments with theoretical calculations, we found that the excellent K-ion storage performance of KVO is attributed to its large interlayered structure and unique 1D morphology. Additionally, we assembled a full KIB composed of KVO and graphite with high energy and power densities, proving its feasibility as a promising new battery. |
| 全文链接 | https://www.sciencedirect.com/science/article/pii/S2451929418304844 |
| 附件地址 |
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