Metal Organic Framework Derivative Improving Lithium Metal Anode Cycling
Metal Organic Framework Derivative Improving Lithium Metal Anode Cycling
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DOI：
10.1002/adfm.201907579
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发表时间：
2020-01
影响因子：
19
通讯作者：
Y. Zhong;Fang Lin;Maoyu Wang;Yifang Zhang;Q. Ma;Julia Lin;Zhenxing Feng;Hailiang Wang
中科院分区：
文献类型：
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作者：
Y. Zhong;Fang Lin;Maoyu Wang;Yifang Zhang;Q. Ma;Julia Lin;Zhenxing Feng;Hailiang Wang
这项工作展示了使用金属有机框架（MOF）材料改进锂金属电池的新方法，这是一种新兴的可充电电池技术。代替直接使用MIL-125-Ti MOF结构，材料被分解成紧密混合的无定形二氧化钛和结晶对苯二甲酸。所得复合材料在抑制Li枝晶生长和延长Li金属电极的循环寿命方面优于单独的氧化物、单独的有机组分和母体MOF。涂覆在商业聚丙烯隔板上，该材料诱导形成包含机械柔性有机物质和离子导电氮化锂物质的期望的固体电解质界面层，这进而导致Li||铜和锂||锂电池可稳定运行数百次充放电循环。此外，这种材料对多硫化锂有很强的吸附作用，也可以有益于锂硫电池的阴极。
This work demonstrates a new approach in using metal organic framework (MOF) materials to improve Li metal batteries, a burgeoning rechargeable battery technology. Instead of using the MIL‐125‐Ti MOF structure directly, the material is decomposed into intimately‐mixed amorphous titanium dioxide and crystalline terephthalic acid. The resulting composite material outperforms the oxide alone, the organic component alone, and the parent MOF in suppressing Li dendrite growth and extending cycle life of Li metal electrodes. Coated on a commercial polypropylene separator, this material induces the formation of a desirable solid electrolyte interphase layer comprising mechanically flexible organic species and ionically conductive lithium nitride species, which in turn leads to Li||Cu and Li||Li cells that can stably operate for hundreds of charging–discharging cycles. In addition, this material strongly adsorbs lithium polysulfides and can also benefit the cathode of lithium–sulfur batteries.