Effects of surface lithiated TiO2 nanorods on room‐temperature properties of polymer solid electrolytes,International Journal of Energy Research

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Effects of surface lithiated TiO2 nanorods on room‐temperature properties of polymer solid electrolytes
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-03-30 , DOI: 10.1002/er.5379
Song Hua ₁ , Jia‐lun Li ₁ , Mao‐xiang Jing ₁ , Fei Chen ₁ , Bo‐wei Ju ₁ , Fei‐yue Tu ₁ , Xiang‐qian Shen ₂ , Shi‐biao Qin ₁

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Polymer solid electrolyte with high ionic conductivity at room‐temperature is most likely to be widely used in solid‐state lithium batteries. In this work, the novel surface lithiated TiO₂ nanorods were firstly used as ionic conductor in polymer solid electrolyte. The surface lithiated TiO₂ nanorods‐filled polypropylene carbonate polymer composite solid electrolyte (CSE) has an uniform composite structure with a thickness of about 60 μm. The ionic conductivity at room‐temperature is 1.21 × 10⁻⁴ S cm⁻¹ and the electrochemical stability window is up to 4.6 V (vs Li⁺/Li). The assembled NCM622/CSE/Li solid‐state battery shows a stable cycle performance with a retention capacity of 120 mAh g⁻¹ after 200 cycles at the current density of 0.3 C and a high coulomb efficiency of 99%. Compared with TiO₂ particles, this novel surface lithiated TiO₂ nanorods can provide more continuous ion transport channels and more Lewis acid‐base reactive sites, provide a novel way to enhance the lithium ion transport in polymer solid electrolyte.

中文翻译：

表面锂化的TiO2纳米棒对聚合物固体电解质室温性能的影响

在室温下具有高离子电导率的聚合物固体电解质最有可能广泛用于固态锂电池。在这项工作中，新型表面锂化的TiO ₂纳米棒首先被用作聚合物固体电解质中的离子导体。表面锂化的TiO ₂纳米棒填充的聚碳酸亚丙酯聚合物复合固体电解质（CSE）具有均匀的复合结构，厚度约为60μm。室温下的离子电导率为1.21×10 ^-4 S cm ^-1，电化学稳定性窗口高达4.6 V（vs Li ⁺ / Li）。组装的NCM622 / CSE / Li固态电池显示出稳定的循环性能，保持容量为120 mAh g ^-1200次循环后，电流密度为0.3 C，库仑效率高达99％。与TiO ₂颗粒相比，这种新型的表面锂化TiO ₂纳米棒可提供更多连续的离子传输通道和更多的路易斯酸碱反应位点，为增强聚合物固体电解质中锂离子的传输提供了一种新颖的方法。

更新日期：2020-03-30

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