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首页> 外文期刊>RSC Advances >Protection of lithium anodes by fibrous silica nanospheres
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Protection of lithium anodes by fibrous silica nanospheres

机译：通过纤维状二氧化硅纳米球保护锂阳极

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Lithium metal (anode) has attracted significant attention for use in lithium-metal batteries due to its high energy density, but its practical application is still hindered by the dendrite growth during the battery charging process. Here, fibrous silica nanospheres were prepared via a direct hydrothermal reaction and coated on a separator to form a composite electrode with lithium sheets. Upon using this composite electrode in a symmetrical cell, the charge and discharge curves became more stable and the overpotential was alleviated compared with that of the bare lithium metal electrode. Meanwhile, the coulombic efficiency obtained from the Li‖Cu cell remained above 95.9% after 200 cycles at 0.5 mA h cm ~(?2) . The validity of using this composite electrode in the Li‖LFP (LiFePO _(4) , lithium iron phosphate) cells was also evaluated. The results show that the composite electrode can help restrict the growth of lithium dendrites and the accumulation of dead lithium.
机译：锂金属（阳极）由于其高能量密度而吸引了在锂金属电池中使用的重大关注，但其实际应用仍然受到电池充电过程中的树突生长的阻碍。这里，通过直接水热反应制备纤维状二氧化硅纳米球，并涂覆在隔膜上以形成具有锂板的复合电极。在在对称电池中使用该复合电极时，电荷和放电曲线变得更稳定，并且与裸锂金属电极的电极相比减轻了过电位。同时，在0.5mA H cm〜（β2）下200次循环后，从Li‖Cu细胞获得的库仑效率高于95.9％。还评估了使用该复合电极在Li‖lFP（LiFePo _（4），锂铁磷酸锂）细胞中的有效性。结果表明，复合电极有助于限制锂枝晶锂的生长和死锂的积累。

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