High rate capability performance of ordered mesoporous TiNb6O17 microsphere anodes for lithium ion batteries

We report the synthesis and application of ordered mesoporous TiNb6O17 microspheres (M-TNO) using a one-step solvothermal method for the first time in lithium-ion batteries. The diameters of TiNb6O17 microspheres are in the range from 2.2 to 2.4 μm with a mesopore size of about 35 nm, which promotes...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2017, Vol.46 (48), p.17061-17066
Main Authors: Sun, Ruixue, Liu, Guangyin, Cao, Shuzhi, Dong, Bitao, Liu, Xiaodi, Hu, Min, Liu, Miao, Duan, Xinying
Format: Article
Language:English
Subjects:
Chemical synthesis
Current density
Lithium
Lithium-ion batteries
Microspheres
Rechargeable batteries
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Summary:We report the synthesis and application of ordered mesoporous TiNb6O17 microspheres (M-TNO) using a one-step solvothermal method for the first time in lithium-ion batteries. The diameters of TiNb6O17 microspheres are in the range from 2.2 to 2.4 μm with a mesopore size of about 35 nm, which promotes the electron and ion migration in charge/discharge processes. M-TNO shows a high specific capacitance (307.2 mA h g−1) at a low current density of 0.2 C and a long-term cycle life over 500 cycles as an electrode. The retentive capacity of the batteries is 77% of the initial cycle after 500 cycles. It is worth noting that M-TNO exhibits excellent rate capacity, which decreases slowly from 265.7 to 172.4 mA h g−1 with the current density increasing from 1 C to 30 C. The retentive capacity at a current density of 30 C is 65% compared to that at 1 C.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt03514d