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N-carbon from waste tea as efficient anode electrode material in lithium ion batteries
- N-carbon from waste tea as efficient anode electrode material in lithium ion batteries
- Chaudhari, Nitin Kaduba; Bhattacharjya, Dhrubajyoti; Kim, Hern; Yu, Jong Sung; Chung, Wook Jin
- DGIST Authors
- Yu, Jong Sung
- Issue Date
- Journal of Nanoscience and Nanotechnology, 17(3), 1838-1846
- Article Type
- Anodes; Capacitive Performance; Carbon; Charge-Discharge Process; Electric Batteries; Electric Discharges; Electrodes; Heteroatoms; High Reversible Capacities; Ions; Lithium; Lithium-Ion Batteries; Lithium-Ion Battery; Lithium Alloys; Lithium Compounds; Mesoporous Materials; Mesoporous Structures; Nano-Structured Carbons; office Buildings; Pyrolysis; Pyrolysis Temperature; Secondary Batteries; Synthesized Carbon; Tea; Waste; Wastes
- Nanostructured carbon having nitrogen as heteroatom was synthesized from waste tea, a cheap and abundant waste generated around the world. The synthesis process is simple, environmental being one-step pyrolysis in inert atmosphere. The carbon synthesized at 800°C (WTC-800) has mesh like morphology with abundantmesopores. The BET analysis reveals mesoporous nature with specific surface area of 384 m2g-1. The porous morphology was found to diminish with increase in pyrolysis temperature. XPS analysis reveals the presence of 1.8-2.5% N-content with predominantly graphitic-N. As-synthesized carbons are investigated as anode material for Li-ion battery. The mesoporous structure and N doping endowed WTC-800 with high reversible capacity up to 567 mAhg-1 at 0.1 C rate, much higher than commercial graphite based anode. Furthermore, the charge discharge process of WTC-800 is not only stable and reversible at high current rate (49% retention at 1 C rate), but also stable up to 100 cycles (78% retention). Relation of capacitive performance with surface area, porosity and N doping is studied and explained promptly. Combined with easy synthesis method, mesoporous structure, inherent N content with abundantly available waste precursor made this carbon material as suitable candidate for electrode materials in Li ion battery applications. Copyright © 2017 American Scientific Publishers All rights reserved.
- American Scientific Publishers
- Related Researcher
Yu, Jong Sung
Light, Salts and Water Research Group
Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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- Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
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