Journal
NANOTECHNOLOGY
Volume 32, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/abb9d8
Keywords
Li-ion capacitor; rate capability; cycling stability; dual graphene-based materials; energy density
Funding
- Ministry of Science and Technology of China (MOST) [2016YFA0200200]
- National Natural Science Foundation of China (NSFC) [51633002]
- Henan Provincial Key Research and Development Program [192102310202]
- [16ZXCLGX00100]
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The all graphene-based LICs designed in this study demonstrate high specific capacity, energy density, power density, and long cycling performance, showing promising applications in energy storage systems.
Lithium-ion capacitors (LICs) are now drawing increasing attention because of their potential to overcome the current energy limitations of supercapacitors and power limitations of lithium-ion batteries. In this work, we designed LICs by combining an electric double-layer capacitor cathode and a lithium-ion battery anode. Both the cathode and anode are derived from graphene-modified phenolic resin with tunable porosity and microstructure. They exhibit high specific capacity, superior rate capability and good cycling stability. Benefiting from the graphene-enhanced electrode materials, the all graphene-based LICs demonstrate a high working voltage (4.2 V), high energy density of 142.9 Wh kg(-1), maximum power density of 12.1 kW kg(-1)with energy density of 50 Wh kg(-1), and long stable cycling performance (with similar to 88% capacity retention after 5000 cycles). Considering the high performance of the device, the cost-effective and facile preparation process of the active materials, this all graphene-based lithium-ion capacitor could have many promising applications in energy storage systems.
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