With the rapid development of electric vehicles and various electronic products, higher energy density lithium-ion batteries are imperative to develop. As one of the key materials for lithium-ion batteries, anode materials with high energy density have become a research focus. Especially, InO has received increasing attention due to its mature preparation technology, environmental protection, low work voltage, and high theoretical lithium storage capacity. However, the poor conductivity and serious volume change during the lithium removal/insertion process of InO anode limit its performance. Based on this, a hierarchical porous nanotube InO (HPNT-InO) anode is successfully prepared, in which the continuous one-dimensional nanotube structure of HPNT-InO and abundant porous channels can provide the large specific surface area, accelerate the charge transfer rate, and supply a large number of Li storage active site. Moreover, the HPNT-InO anode can maintain a higher reversible specific capacity of 470 mAh g after 180 cycles at 0.1C, improve the cycling performance and rate performance, compared with a granular InO anode. This work provides a new avenue to develop high performance anode materials for lithium-ion batteries.

中文翻译：

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构建高性能锂离子电池分级多孔纳米管In2O3负极

随着电动汽车和各种电子产品的快速发展，开发更高能量密度的锂离子电池势在必行。作为锂离子电池的关键材料之一，高能量密度的负极材料已成为研究热点。尤其是InO因其制备技术成熟、环保、工作电压低、理论储锂容量高而受到越来越多的关注。然而，InO负极的导电性较差，脱嵌锂过程中体积变化严重，限制了其性能。在此基础上，成功制备了分级多孔纳米管InO（HPNT-InO）阳极，其中HPNT-InO连续的一维纳米管结构和丰富的多孔通道可以提供大的比表面积，加快电荷转移速率，并供应大量的储锂活性位点。此外，与粒状InO负极相比，HPNT-InO负极在0.1C下循环180次后仍能保持470 mAh g的较高可逆比容量，提高了循环性能和倍率性能。这项工作为开发高性能锂离子电池负极材料提供了新途径。