High‐Rate Performance and Ultralong Cycle Life Enabled by Hybrid Organic–Inorganic Vanadyl Ethylene Glycolate for Lithium‐Ion Batteries,Advanced Energy Materials

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High‐Rate Performance and Ultralong Cycle Life Enabled by Hybrid Organic–Inorganic Vanadyl Ethylene Glycolate for Lithium‐Ion Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-10-08 , DOI: 10.1002/aenm.201801978
Xinran Wang ₁ , Xuanxuan Bi ₂ , Shili Zheng ₁ , Shaona Wang ₁ , Yi Zhang ₁ , Hao Du _{1,

3} , Jun Lu ₂

Affiliation

Transition metal oxides (TMOs) possess high theoretical capacity and serve as promising anode candidates for lithium‐ion batteries. However, the intrinsic low conductivity handicaps the application of TMOs. Molecular modification by coupling TMOs structure with Li‐ion conductive polymer ligands can facilitate the kinetics of electrochemical lithiation/delithiation process. Herein, a proof‐of‐concept investigation on the Li‐ion storage capability by vanadyl ethylene glycolate (VEG) is achieved with the improvement of Li‐ion diffusion kinetics by modifiying the vanadium oxide with organic ligands. VEG demonstrates unprecedented advantage for fast rate capability, stable cycleability, and high capacity at both room temperarture (25 °C) and elevated temperature (60 °C).

中文翻译：

锂离子电池的有机-无机钒氧乙醇酸杂化物杂化物可实现较高的性能和超长的循环寿命

过渡金属氧化物（TMO）具有很高的理论容量，可作为锂离子电池的有希望的阳极候选材料。但是，固有的低电导率阻碍了TMO的应用。通过将TMO结构与锂离子导电聚合物配体偶联来进行分子修饰可促进电化学锂化/脱锂过程的动力学。在此，通过用有机配体修饰氧化钒，改善锂离子扩散动力学，从而实现了通过乙二醇乙二醇氧钒（VEG）对锂离子存储能力的概念验证研究。VEG在室温（25°C）和高温（60°C）下均具有快速速率能力，稳定的循环能力和高容量方面的空前优势。

更新日期：2018-10-08

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