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J. Low Power Electron. Appl. 2018, 8(3), 32;

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Department of Applied Physics, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences, Beijing 100083, China
College of Nanoscience and Technology, University of Chinese Academy of Sciences, Bejing 100049, China
Authors to whom correspondence should be addressed.
Received: 13 June 2018 / Revised: 27 August 2018 / Accepted: 4 September 2018 / Published: 11 September 2018
(This article belongs to the Special Issue Flexible Electronics and Self-Powered Systems)
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Porous materials have superior electrochemical performance owing to its their structure, which could increase the specific and contact area with the electrode. The spinel Li4Mn5O12 has a three-dimensional tunnel structure for a better diffusion path, which has the advantage of lithium ion insertion and extraction in the framework. However, multi-space spherical materials with single morphologies are rarely studied. In this work, waxberry-like and raspberry-like nanospheres for Li4Mn5O12 have been fabricated by the wet chemistry and solid-state methods for the first time. The diameter of a single waxberry- and raspberry-like nanosphere is about 1 μm and 600 nm, respectively. The specific capacitance of Li4Mn5O12 was 535 mF cm−2 and 147.25 F g−1 at the scan rate of 2 mV s−1, and the energy density was 110.7 Wh kg−1, remaining at 70% after 5000th charge-discharge cycles. Compared with raspberry-like nanosphere Li4Mn5O12, the waxberry-like nanoporous spinel Li4Mn5O12 shows the better electrochemical performance and stability; furthermore, these electrochemical performances have been improved greatly compared to the previous studies. All these results indicate that the waxberry-like nanoporous spinel Li4Mn5O12 could provide a potential application in high performance supercapacitors. View Full-Text
Keywords: supercapacitors; Li4Mn5O12; waxberry-like nanosphere; high performance supercapacitors; Li4Mn5O12; waxberry-like nanosphere; high performance

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Ji, P.; Xi, Y.; Zhang, C.; Wang, C.; Hu, C.; Guan, Y.; Zhang, D. Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors. J. Low Power Electron. Appl. 2018, 8, 32.

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