A stable 3 V all-solid-state sodium–ion battery based on a closo-borate electrolyte,Energy & Environmental Science

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A stable 3 V all-solid-state sodium–ion battery based on a closo-borate electrolyte
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1039/c7ee02420g
L. Duchêne _{1,

2,

3,

4,

5} , R.-S. Kühnel _{1,

2,

3,

4} , E. Stilp _{1,

2,

3,

4} , E. Cuervo Reyes _{1,

2,

3,

4} , A. Remhof _{1,

2,

3,

4} , H. Hagemann _{4,

5,

6,

7} , C. Battaglia _{1,

2,

3,

4}

Affiliation

We report on a particularly stable 3 V all-solid-state sodium–ion battery built using a closo-borate based electrolyte, namely Na₂(B₁₂H₁₂)_0.5(B₁₀H₁₀)_0.5. Battery performance is enhanced through the creation of an intimate cathode–electrolyte interface resulting in reversible and stable cycling with a capacity of 85 mA h g⁻¹ at C/20 and 80 mA h g⁻¹ at C/5 with more than 90% capacity retention after 20 cycles at C/20 and 85% after 250 cycles at C/5. We also discuss the effect of cycling outside the electrochemical stability window and show that electrolyte decomposition leads to faster though not critical capacity fading. Our results demonstrate that owing to their high stability and conductivity closo-borate based electrolytes could play a significant role in the development of a competitive all-solid-state sodium–ion battery technology.

中文翻译：

稳定的3 V全固态钠离子电池基于一个闭合碳硼酸盐电解质

我们上特别稳定的3 V全固态钠离子电池报告内置使用闭合碳硼酸盐系电解液，即钠₂（B ₁₂ H ^ ₁₂）_0.5（B ₁₀ H ^ ₁₀）_0.5。通过创建紧密的阴极-电解质界面可增强电池性能，从而实现可逆和稳定的循环，在C / 20时的容量为85 mA hg ^-1，在80 mA hg ^-1时在C / 5的情况下，在C / 20的20个循环后保持90％以上的容量，在C / 5的250个循环后保持85％以上的容量。我们还讨论了在电化学稳定性窗口外循环的影响，并表明电解质分解会导致更快（尽管不是关键的容量衰减）。我们的研究结果表明，由于其高稳定性和导电性闭合碳-硼酸基电解质能在竞争激烈的全固态钠离子电池技术的发展发挥了显著的作用。

更新日期：2017-11-27

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