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首页> 外文期刊>Chemistry: A European journal >Multiple Ambient Hydrolysis Deposition of Tin Oxide into Nanoporous Carbon To Give a Stable Anode for Lithium-Ion Batteries
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Multiple Ambient Hydrolysis Deposition of Tin Oxide into Nanoporous Carbon To Give a Stable Anode for Lithium-Ion Batteries

机译：氧化锡在纳米孔碳中的多次环境水解沉积，从而为锂离子电池提供稳定的阳极

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摘要

A novel ambient hydrolysis deposition (AHD) methodology that employs sequential water adsorption followed by a hydrolysis reaction to infiltrate SnO_2 nanoparticles into the nanopores of mesoporous carbon in a conformal and controllable manner is introduced. The empty space in the SnO_2/C composites can be adjusted by varying the number of AHD cycles. An SnO_2/C composite with an intermediate SnO_2 loading exhibited an initial specific delithiation capacity of 1054 mAhg~(-1) as an anode for Li-ion batteries. The capacity contribution from SnO_2 in the composite electrode approaches the theoretical capacity of SnO_2 (1494 mAhg~(-1)) if both Sn alloying and SnO_2 conversion reactions are considered to be reversible. The composite shows a specific capacity of 573 mAh g~(-1) after 300 cycles, that is, one of the most stable cycling performances for SnO_2/mesoporous carbon composites. The results demonstrated the importance of well-tuned empty space in nanostructured composites to accommodate expansion of the electrode active mass during alloying/dealloying and conversion reactions.
机译：介绍了一种新颖的环境水解沉积（AHD）方法，该方法采用连续的水吸附，然后进行水解反应，以保形和可控的方式将SnO_2纳米颗粒渗透到介孔碳的纳米孔中。可以通过改变AHD循环数来调整SnO_2 / C复合材料中的空白空间。 SnO_2负载中等的SnO_2 / C复合材料作为锂离子电池的负极，其初始脱锂容量为1054 mAhg〜（-1）。如果认为Sn合金化和SnO_2转化反应都是可逆的，则复合电极中SnO_2的容量贡献接近SnO_2的理论容量（1494 mAhg〜（-1））。该复合材料在300次循环后显示出573 mAh g〜（-1）的比容量，这是SnO_2 /中孔碳复合材料最稳定的循环性能之一。结果表明，在合金结构/脱合金和转化反应过程中，微调纳米结构复合材料中的空隙对于适应电极活性物质膨胀的重要性。

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