Zirconia-supported solid-state electrolytes for high-safety lithium secondary batteries in a wide temperature range,Journal of Materials Chemistry A

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Zirconia-supported solid-state electrolytes for high-safety lithium secondary batteries in a wide temperature range
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-11-01 00:00:00 , DOI: 10.1039/c7ta07653c
Renjie Chen _{1,

2,

3,

4,

5} , Wenjie Qu _{1,

2,

3,

4} , Ji Qian _{1,

2,

3,

4} , Nan Chen _{1,

2,

3,

4} , Yujuan Dai _{1,

2,

3,

4} , Cui Guo _{1,

2,

3,

4} , Yongxin Huang _{1,

2,

3,

4} , Li Li _{1,

2,

3,

4,

5} , Feng Wu _{1,

2,

3,

4,

5}

Affiliation

High safety is a long-sought-after goal in the energy storage field. We fabricate a high-safety solid-state electrolyte by in situ immobilizing ionic liquids within a nanoporous zirconia-supported matrix. This ionogel electrolyte provides a combination of the solid-like physical support and liquid-like ionic transport performance, which substantially improves the thermal stability and safety without sacrificing ionic conductivity. Both Raman spectra and density functional theory computations indicate that the zirconia skeleton interacts with the Li salts, promoting the dissociation and transport of Li⁺. The solid-state cell assembled with this electrolyte possesses excellent cycling performance, with a discharge capacity of 135.9 mA h g⁻¹ after 200 cycles at 30 °C and works well in a wide operating temperature range from −10 to 90 °C. Moreover, the good compatibility and stable interface toward Li–metal anodes in a symmetrical cell demonstrates the usefulness of the electrolyte in Li–metal batteries. These results indicate that this ionogel electrolyte has great promise for application in the energy storage field because of its dramatically improved safety characteristic.

中文翻译：

氧化锆支持的固态电解质，适用于宽温度范围的高安全性锂二次电池

在储能领域中，高安全性是一个长期追求的目标。我们通过将离子液体原位固定在纳米多孔氧化锆支撑的基质中来制造高安全性固态电解质。该离子凝胶电解质提供了固体状物理载体和液体状离子传输性能的组合，这在不牺牲离子传导性的情况下大大提高了热稳定性和安全性。拉曼光谱和密度泛函理论计算均表明，氧化锆骨架与Li盐相互作用，从而促进Li ⁺的解离和运输。用这种电解质组装的固态电池具有出色的循环性能，放电容量为135.9 mA hg ^-1在30°C时经过200个循环后，可在-10至90°C的宽工作温度范围内良好工作。此外，对称电池中与锂金属阳极的良好相容性和稳定的界面证明了锂金属电池中电解质的有用性。这些结果表明，这种离子凝胶电解质由于其显着改善的安全特性而在能量存储领域具有广阔的应用前景。

更新日期：2017-11-17

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