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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 KadubaBhattacharjya, DhrubajyotiKim, HernYu, Jong SungChung, Wook Jin
DGIST Authors
Yu, Jong Sung
Issued Date
Article Type
AnodesCapacitive PerformanceCarbonCharge-Discharge ProcessElectric BatteriesElectric DischargesElectrodesHeteroatomsHigh Reversible CapacitiesIonsLithiumLithium-Ion BatteriesLithium-Ion BatteryLithium AlloysLithium CompoundsMesoporous MaterialsMesoporous StructuresNano-Structured Carbonsoffice BuildingsPyrolysisPyrolysis TemperatureSecondary BatteriesSynthesized CarbonTeaWasteWastes
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
  • 유종성 Yu, Jong-Sung 에너지공학과
  • Research Interests 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 Engineering Light, Salts and Water Research Group 1. Journal Articles


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