Gentle Haulers of Lithium-Ion–Nanomolybdenum Carbide Fillers in Solid Polymer Electrolyte,ACS Energy Letters

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Gentle Haulers of Lithium-Ion–Nanomolybdenum Carbide Fillers in Solid Polymer Electrolyte
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-06-10 , DOI: 10.1021/acsenergylett.2c00849
Yuhang Shan ₁ , Libo Li ₁ , Xiaochuan Chen ₁ , Shubo Fan ₁ , Hang Yang ₁ , Yanxia Jiang ₁

Affiliation

Nanomolybdenum carbides with different morphologies and structures are inorganic fillers in solid polymer electrolytes. The matrices were polyvinylidene fluoride (PVDF) and polyvinylidene fluoride–hexafluoropropylene (PVDF–HFP). Nanomolybdenum carbides (Mo₂C) reduced the energy barrier of lithium-ion transfer. The nanofiller Mo₂C with a hexagonal system built the carrier channel by charge intervention for good dynamic behavior. More effective carriers between the electrode and electrolyte interface were conducive to a uniform charge distribution and even deposition of lithium ion. The ionic conductivity of the polymer electrolyte was 7.27 × 10^–4 S cm^–1 at room temperature with an electrochemical stability window of 4.23 V and a lithium-ion transference number of 0.63. Solid-state batteries performed 500 cycles at a high current density of 2 C, with a capacity retention rate of 51.6%, including dendrite-free lithium anodes and stable SEI films.

中文翻译：

锂离子纳米碳化钼填料在固体聚合物电解质中的轻柔运输

具有不同形貌和结构的纳米碳化钼是固体聚合物电解质中的无机填料。基质是聚偏二氟乙烯 (PVDF) 和聚偏二氟乙烯-六氟丙烯 (PVDF-HFP)。纳米碳化钼（Mo ₂ C）降低了锂离子转移的能垒。具有六边形系统的纳米填料Mo ₂ C通过电荷干预构建了载流子通道，以获得良好的动态行为。电极和电解质界面之间更有效的载流子有利于电荷分布均匀，锂离子沉积均匀。聚合物电解质的离子电导率为 7.27 × 10 ^–4 S cm ^–1在室温下，电化学稳定性窗口为 4.23 V，锂离子迁移数为 0.63。固态电池在 2 C 的高电流密度下循环 500 次，容量保持率为 51.6%，包括无枝晶锂负极和稳定的 SEI 膜。

更新日期：2022-06-10

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