Li 4 Ti 5 O 12 Coated by Biomass-Derived Carbon Quantum Dots as Anode Material with Enhanced Electrochemical Performance for Lithium-Ion Batteries

Marcin Krajewski (), Chun-Hao Chen, Zhi-Ting Huang and Jeng-Yu Lin ()
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Marcin Krajewski: Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland
Chun-Hao Chen: Department of Chemical Engineering and Biotechnology, Tatung University, No. 40, Sec. 3, Chungshan N. Rd., Taipei City 10452, Taiwan
Zhi-Ting Huang: Department of Chemical and Materials Engineering, Tunghai University, No. 181, Sec. 3, Taichung Port Rd., Taichung City 40704, Taiwan
Jeng-Yu Lin: Department of Chemical and Materials Engineering, Tunghai University, No. 181, Sec. 3, Taichung Port Rd., Taichung City 40704, Taiwan

Energies, 2022, vol. 15, issue 20, 1-13

Abstract: Li 4 Ti 5 O 12 (LTO) is a promising anode material for lithium-ion batteries (LIBs) due to its stable reversibility, high-rate cyclability, and high operational potential. On the other hand, it suffers from poor electronic conductivity and low capacitance. To overcome these disadvantages, modification of the LTO surface is frequently undertaken. Considering this idea, the production of a biomass-derived carbon-coated LTO material (LTO/C) and its application as an anode in LIBs is described in this work. The carbon precursor was obtained from commercial carrot juice, which was degraded using microwaves. According to the UV studies, the carbon precursor revealed similar properties to carbon quantum dots. Then, it was deposited on LTO synthetized through a sol-gel method. The LTO/C electrode exhibited a high specific capacity of 211 mAhg −1 at 0.1 C. Capacity retention equal to 53% of the initial value was found for the charge–discharge rate increase from 0.1 C to 20 C. The excellent electrochemical performance of LTO/C was caused by the carbon coating, which provided (i) short diffusion pathways for the Li + ions into the LTO structure and (ii) enhanced electronic conductivity. The obtained results indicated that biomass-derived carbon quantum dot-coated LTO can be considered as a promising anode for LIBs.

Keywords: anode material; biomass-derived carbon; carbon coating; carbon quantum dot; lithium-ion battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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