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Red blood cell-like carbon hollow sphere anchored ultrathin Na2Ti3O7 nanosheets as long cyclic and high rate-performance anodes for sodium-ion batteries

Abstract

Sodium titanate (Na2Ti3O7) has been proved to be a potential anode material for sodium-ion battery. While the poor rate capability and low electrical conductivity seriously hindered its application. Therefore, a unique red blood cell-like hollow carbon sphere supported Na2Ti3O7 sodium titanate nanosheets (Na2Ti3O7@RHCS)structure was designed here, which can both improve its electrical conductivity and preserve the structural stability, thus obtain high rate performance. In addition, the red blood cell-like structure spheres can greatly improve increase the compacted density via a dense packing mode just like the red blood cell stacked up together one by one. Meanwhile, the ultrathin nanosheet-like morphology of Na2Ti3O7 could further increase the active reaction sites and reduce the diffusion path of sodium ions during charge-discharge process. This well-designed material exhibits a good cycling performance: a reversible capacity of 110.46 mAh g-1 at 5 C and 45.71 mAh g-1 at 50 C.

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Publication details

The article was received on 25 Apr 2018, accepted on 05 Jun 2018 and first published on 06 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA03799J
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Red blood cell-like carbon hollow sphere anchored ultrathin Na2Ti3O7 nanosheets as long cyclic and high rate-performance anodes for sodium-ion batteries

    S. Chen, Y. Pang, J. Liang and S. Ding, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA03799J

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