Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 11, Pages 17767-17775Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.04.082
Keywords
ZnO; N-doped carbon; Lightweight; Arrays; Lithium storage
Categories
Funding
- Central Government Research Programs to Guide the Local Scientific and Technological Development [2018L3001]
- National Natural Science Foundation of China [U1732155, 51872048]
- Natural Science Foundation of Fujian Province, China [2017J01687, 2018J01677]
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Traditional slurry-based electrodes consist of heavy current collectors and electroactive materials with a low weight percentage, which inevitably increase the total weight and cost of lithium-ion batteries (LIBs). Consequently, the development of low-cost, lightweight, flexible and binder-free electrodes for LIBs is highly desirable but also greatly challenging. In this work, we report the synthesis of small ZnO nanoparticles uniformly embedded in N-doped carbon (NC) nanoplate arrays (NPAs) tightly grown on a N-doped carbon paper (NCP) substrate (ZnO/NC NPAs@NCP) through a facile metal-organic framework-engaged strategy. This electrode design not only avoids the utilisation of insulating polymer binders but also offers other advantages, including large electrode/electrolyte contact areas, abundant electroactive sites, good wettability of the electrolyte, fast electron/ion transport and efficient volume accommodation. Notably, the freestanding ZnO/NC NPAs@NCP electrode displays a high reversible capacity of 610 mA h g(-1) (based on the mass of entire electrode) at a current density of 100 mA g(-1) for 50 cycles and excellent long-term cycling stability (363 mA h g(-1) at 500 mA g(-1) for 200 cycles). Furthermore, a full cell employing ZnO/NC NPAs@NCP as the anode and commercial LiFePO4 as the cathode is constructed, indicating the feasibility for practical application. Moreover, an analysis of the electrode kinetics confirms the favourable lithium-ion storage kinetics within the ZnO/NC NPAs@NCP electrode. The present work could provide a new approach to develop low-cost, lightweight and flexible electrodes for advanced energy storage.
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