All-solid-state lithium batteries employing inorganic solid electrolytes have been regarded as an ultimate solution to safety issues because of their features of no leakage as well as incombustibility and they are expected to achieve higher energy densities owing to their simplified structure. Two-dimensional transition-metal dichalcogenides exhibit a great potential in energy storage devices because of their unique physical and chemical characteristics. In this work, 50 nm thick highly crystalline layered VS₂ (hc-VS₂) nanosheets are prepared by a solvothermal method, and their electrochemical performances are evaluated in Li/75% Li₂S-24% P₂S₅-1% P₂O₅/Li₁₀GeP₂S₁₂/hc-VS₂ all-solid-state lithium batteries. At 50 mA g^–1, hc-VS₂ nanosheets show a high reversible capacity of 532.2 mAh g^–1 after 30 cycles. Moreover, stable discharge capacities are maintained at 436.8 and 270.4 mAh g^–1 at 100 and 500 mA g^–1 after 100 cycles, respectively. The superior rate capability and cycling stability are ascribed to the better electronic conductivity and well-developed layered structure. In addition, the electrochemical reaction kinetics and capacity contributions were analyzed via cyclic voltammetry measurements at different scan rates.

中文翻译：

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适用于全固态锂电池的高度结晶层状VS ₂纳米片，具有增强的电化学性能

采用无机固体电解质的全固态锂电池由于其无泄漏和不燃的特性而被认为是解决安全问题的最终解决方案，并且由于其简化的结构，有望实现更高的能量密度。二维过渡金属二卤化物因其独特的物理和化学特性而在储能装置中显示出巨大的潜力。在这项工作中，通过溶剂热法制备了50 nm厚的高度结晶层状VS ₂（hc-VS ₂）纳米片，并在Li / 75％Li ₂ S-24％P ₂ S ₅ -1％中评估了它们的电化学性能。P ₂ O ₅ /锂₁₀ GeP ₂ S ₁₂ / hc-VS ₂全固态锂电池。在50 mA g ^–1下，hc-VS ₂纳米片在30个循环后显示出532.2 mAh g ^–1的高可逆容量。此外，经过100次循环后，在100和500 mA g ^–1时，稳定的放电容量分别保持在436.8和270.4 mAh g ^–1。优异的倍率能力和循环稳定性归因于更好的电子导电性和发达的分层结构。另外，通过循环伏安法在不同的扫描速率下分析电化学反应动力学和容量贡献。