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Type: Journal article
Title: Ultrathin titanate nanosheets/graphene films derived from confined transformation for excellent Na/K ion storage
Author: Zeng, C.
Xie, F.
Yang, X.
Jaroniec, M.
Zhang, L.
Qiao, S.
Citation: Angewandte Chemie International Edition, 2018; 57(28):8540-8544
Publisher: Wiley
Issue Date: 2018
ISSN: 1433-7851
Statement of
Cheng Zeng, Fangxi Xie, Xianfeng Yang, Mietek Jaroniec, Lei Zhang, and Shi-Zhang Qiao
Abstract: Confined transformation of assembled two-dimensional MXene (titanium carbide) and reduced graphene oxide (rGO) nanosheets was employed to prepare the free-standing films of the integrated ultrathin sodium titanate (NTO)/potassium titanate (KTO) nanosheets sandwiched between graphene layers. The ultrathin Ti-based nanosheets reduce the diffusion distance while rGO layers enhance conductivity. Incorporation of graphene into the titanate films produced efficient binder-free anodes for ion storage. The resulting NTO/rGO electrode for sodium ion batteries exhibited an excellent rate performance and long cycling stability characterized by reversible capacity of 72 mA h g-1 at 5 A g-1 after 10000 cycles. Moreover, flexible KTO/rGO electrode for potassium ion batteries maintained a reversible capacity of 75 mA h g-1 after 700 cycles at 2 A g-1. These results demonstrate the superiority of the unique sandwich-type electrodes.
Keywords: anode materials; sandwich structures; sodium titanate; sodium-ion batteries; ultrathin nanosheets
Rights: Copyright 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
RMID: 0030086500
DOI: 10.1002/anie.201803511
Grant ID:
Appears in Collections:Chemical Engineering publications

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