Mesoporous Thin-Wall Molybdenum Nitride for Fast and Stable Na/Li Storage

Jiang G, Qiu Y, Lu Q, Zhuang W, Xu X, Kaskel S, Xu F, Wang H (2019)

Publication Type: Journal article

Publication year: 2019

Journal

ACS Applied Materials and Interfaces American Chemical Society

Book Volume: 11

Pages Range: 41188-41195

Journal Issue: 44

DOI: 10.1021/acsami.9b07060

Abstract

Sluggish reaction kinetics induced by the poor solid-state ion diffusion and low electrical conductivity of electrode materials are currently in conflict with increasing fast-charge needs for sodium-ion batteries (SIBs) based on conversion mechanism. Herein, mesoporous, conductive, thin-wall three-dimensional (3D) skeletons of molybdenum nitride (meso-Mo2N) were established and employed as anodes to facilitate the rate performance of SIBs. Mesoporous channels (∼9.3 nm) with very thin walls (<8 nm) and conductive networks in meso-Mo2N enable the rapid Na⁺ infiltrability/diffusion and fast electron migration, respectively. The facilitated ion diffusion/transfer ability is corroborated by cyclic voltammetry tests and galvanostatic intermittent titration technique with a higher Na⁺ diffusion coefficient and a larger Na⁺ diffusion-dominated capacity. Consequently, meso-Mo2N exhibits a superior rate capability and a steady specific capacity of 158 mAh g^-1 at 1 A g^-1 after 1000 cycles for SIBs, surpassing the nonporous Mo2N and even the previously reported Mo2N. Furthermore, the proof of concept can be also extended to enhanced Li storage. Such a mesostructured design with 3D mesoporous, conductive thin walls of electrodes is a promising strategy for achieving fast-charging and high-performance Na/Li storage.

Involved external institutions

Northwestern Polytechnical University / 西北工业大学 (NPU/NWPU)

China (CN) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden

Germany (DE) Technische Universität Dresden

Germany (DE)

How to cite

APA:

Jiang, G., Qiu, Y., Lu, Q., Zhuang, W., Xu, X., Kaskel, S.,... Wang, H. (2019). Mesoporous Thin-Wall Molybdenum Nitride for Fast and Stable Na/Li Storage. ACS Applied Materials and Interfaces, 11(44), 41188-41195. https://doi.org/10.1021/acsami.9b07060

MLA:

Jiang, Guangshen, et al. "Mesoporous Thin-Wall Molybdenum Nitride for Fast and Stable Na/Li Storage." ACS Applied Materials and Interfaces 11.44 (2019): 41188-41195.

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