Design of polydopamine-encapsulation multiporous MnO cross-linked with polyacrylic acid binder for superior lithium ion battery anode

• Published in: Journal of alloys and compounds Vol. 783; pp. 341 - 348
• Main Authors: Zhang, Jufeng, Ren, Ting, Nayaka, G.P., Dong, Peng, Duan, Jianguo, Li, Xue, Zhang, Yingjie, Wang, Ding
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30-04-2019; Elsevier BV
• Subjects: Anode electrode; Anodes; Buffers; Carbothermic reactions; Cross-linking reaction; Crosslinking; Dimensional stability; Energy storage; Flux density; Fourier transforms; Industrial development; Infrared spectroscopy; Lithium; Lithium-ion batteries; Manganese dioxide; Manganese oxides; Microwave-assisted carbothermic reduction; Optimization; Organic chemistry; Photoelectrons; Polyacrylic acid; Polydopamine; Rechargeable batteries; Spectrum analysis; Structural stability; Polydopamine; Cross-linking reaction; Anode electrode; Microwave-assisted carbothermic reduction
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2018.12.356

Investigating independent active materials is inadequate to settle the technological challenges involved in the booming lithium ion battery industry. The further development of energy-storage properties with both high energy density and superior cycling lifespan are highly dependent on the overall system optimization, which highlights the study of the interface between different components in a system. Herein, a system-level strategy of engineering MnO-based anode build on the plentiful electrolytic manganese dioxide are developed via a microwave-assisted carbothermic reduction, combined with a succeeding in-situ aggregation of polydopamine (PD) onto MnO along with chemical binding with polyacrylic acid (PAA) binder. Fourier transform IR spectra, X-ray photoelectron spectroscopy spectra validate the formation of cross-linking reaction between the PD buffer and PAA binder. Benefited from the prominent structure stability which endowed by well-connected three-dimensional porous structure, as well as two steady interfaces between MnO and PD buffer and between PD buffer and PAA binder, the cross-linked MnO anode exhibit a reversible capacity of 687 mAh g−1 at 300 mA g−1 and high Coulombic efficiency of 99% over 500 cycles and impressive rate capability of 320 mAh g−1 at 3000 mA g−1.
•Multiporous MnO was synthesized via an effective microwave-assisted carbothermic reduction.•A system-level strategy of designing MnO-based anode electrode was proposed.•The anode electrode presents outstanding electrochemical performance.