Hierarchical hollow microspheres assembled from N-doped carbon coated Li4Ti5O12 nanosheets with enhanced lithium storage properties
Hierarchical hollow microspheres assembled from N-doped carbon coated Li4Ti5O12 nanosheets with enhanced lithium storage properties
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由氮掺杂碳涂覆的 Li4Ti5O12 纳米片组装而成的分层空心微球，具有增强的锂存储性能
DOI：
10.1039/c3ta13860g
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发表时间：
2013-11
影响因子：
11.9
通讯作者：
Kezheng Chen
中科院分区：
文献类型：
--
作者：
Zhonghua Zhang;Guicun Li;Hongrui Peng;Kezheng Chen
采用简单的低温溶液法制备了N掺杂碳包覆Li4Ti5O12纳米片(NC-LTO)，并结合高温焙烧制备了层次化空心微球。一次合成的Li4Ti5O12纳米片呈锯齿状，其厚度约为5.0 nm，均匀地包裹着N掺杂的碳层。与由Li4Ti5O12纳米片组成的原始空心微球(A-LTO)相比，NC-LTO空心微球表现出更好的电化学储能性能，包括高容量(0.5C下181.4 mA h g−1)、优异的倍率性能(20 C下140.8 mA h g−1)和良好的循环稳定性(20 C下100次循环后容量损失92.8%)。从N掺杂碳层和锯齿形Li4Ti5O12纳米薄片的引入增加了电子电导率和促进了锂离子的输运，探讨了这些改进的原因。
Hierarchical hollow microspheres composed of N-doped carbon coated Li4Ti5O12 nanosheets (NC-LTO) have been synthesized on a large scale by a facile low-temperature solution-based approach combined with high temperature calcination. The primary Li4Ti5O12 nanosheets show zigzag morphology with a typical thickness of about 5.0 nm, which are uniformly coated with N-doped carbon layers. When evaluated for lithium storage capacity, the NC-LTO hollow microspheres display enhanced electrochemical energy storage performances compared to the pristine hollow microspheres composed of Li4Ti5O12 nanosheets (A-LTO), including high capacity (181.4 mA h g−1 at 0.5 C), excellent rate capability (140.8 mA h g−1 at 20 C), and good cyclic stability (92.8% capacity loss after 100 cycles at 20 C). The reasons for these improvements are explored in terms of the increased electronic conductivity and the facilitation of lithium ion transport arising from the introduction of N-doped carbon layers and the thin zigzag Li4Ti5O12 nanosheets.
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影响因子：
1.5
作者：
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通讯作者：
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影响因子：
3.9
作者：
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影响因子：
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作者：
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通讯作者：
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