Issue 9, 2017

Mille-feuille shaped hard carbons derived from polyvinylpyrrolidone via environmentally friendly electrostatic spinning for sodium ion battery anodes

Abstract

Pursuing low-cost and high-performance anode materials is of great importance for developing practical sodium ion batteries. In this work, mille-feuille shaped hard carbons derived from low-cost and environmentally friendly polyvinylpyrrolidone (PVP) nanofibres are fabricated via simple electrostatic spinning and followed by further pyrolysis at 800–1200 °C, as anode materials for sodium ion batteries. The optimized sample HC-1000 carbonized at 1000 °C shows better particle size and low surface area, and achieves a good reversible capacity of 271 mA h g−1 with 94% capacity retention ratio over 100 cycles. In addition, HC-1000 exhibits satisfactory rate performance, namely, the discharge capacities are 304, 264, 209, 142, 109 and 70 mA h g−1 at a current density of 20, 40, 100, 200, 500 and 1000 mA g−1 after 10 cycles respectively. Even continuing with an additional 280 cycles at 200 mA g−1, the capacity retains 285 mA h g−1 when the current recovers to 20 mA g−1. The mille-feuille shaped morphology, uniform particle size distribution and low surface area enable excellent electrochemical performances of PVP based hard carbon, which is expected to be a promising anode material for Na-ion batteries.

Graphical abstract: Mille-feuille shaped hard carbons derived from polyvinylpyrrolidone via environmentally friendly electrostatic spinning for sodium ion battery anodes

Article information

Article type
Paper
Submitted
23 nov 2016
Accepted
03 jan 2017
First published
17 jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 5519-5527

Mille-feuille shaped hard carbons derived from polyvinylpyrrolidone via environmentally friendly electrostatic spinning for sodium ion battery anodes

Y. Bai, Y. Liu, Y. Li, L. Ling, F. Wu and C. Wu, RSC Adv., 2017, 7, 5519 DOI: 10.1039/C6RA27212F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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