Rutile-TiO2 decorated Li4Ti5O12 nanosheet arrays with 3D interconnected architecture as anodes for high performance hybrid supercapacitors
Rutile-TiO2 decorated Li4Ti5O12 nanosheet arrays with 3D interconnected architecture as anodes for high performance hybrid supercapacitors
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DOI：
10.1039/c5ta07666h
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发表时间：
2015-11
影响因子：
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通讯作者：
Lin Gao;Dekang Huang;Yan Shen;Mingkui Wang
中科院分区：
文献类型：
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作者：
Lin Gao;Dekang Huang;Yan Shen;Mingkui Wang
本文首次报道了金红石型TiO 2修饰的层状Li 4 Ti 5 O 12纳米片阵列在锂离子混合超级电容器中的应用。值得注意的是，自支撑阵列表现出令人印象深刻的倍率性能和循环稳定性，显示出142.9 mA h g-1的可逆比容量，并且在30 C的倍率下在3000次循环中保持其初始容量的92.3%。由Li 4 Ti 5 O 12纳米片阵列和氮掺杂碳纳米管（N-CNT）构成的锂离子混合超级电容器在300 W kg−1的功率密度下表现出74.85 W h kg− 1的储能密度。自支撑的Li 4 Ti 5 O 12-金红石型TiO 2纳米片阵列的分层3D互连纳米结构，以及Li 4 Ti 5 O 12沿[011]方向和金红石型TiO 2沿[001]方向的有效锂扩散，在优异的储能性能中起着重要作用。
Herein, we report on rutile TiO2 decorated hierarchical Li4Ti5O12 nanosheet arrays for lithium ion hybrid supercapacitor application for the first time. It is noted that the self-supported arrays manifest impressive rate capability and cycling stability, showing a reversible specific capacity of 142.9 mA h g−1, and retaining 92.3% of their initial capacity over 3000 cycles at a rate of 30C. The lithium ion hybrid supercapacitor, constructed with Li4Ti5O12 nanosheet arrays and nitrogen doped carbon nanotubes (N-CNTs), exhibits an ultrahigh energy density of 74.85 W h kg−1 at a power density of 300 W kg−1. The hierarchical 3D interconnected nanostructure of the self-supported Li4Ti5O12–rutile TiO2 nanosheet arrays, as well as the efficient lithium diffusion along the [011] direction for Li4Ti5O12 and [001] for rutile TiO2, play an important role in the outstanding energy storage performance.