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Overcharge Self-Regulated Li-ion Battery Based on LiFePO4 via a Solid State Combined Cathode

Published online by Cambridge University Press:  24 January 2017

Fei Gu ,
Kichang Jung ,
Taehoon Lim  and
Alfredo A. Martinez-Morales
Fei Gu*
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California 92521 Winston Chung Global Energy Center, University of California, Riverside, California 92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California 92507
Kichang Jung
Affiliation:
Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California 92507
Taehoon Lim
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California 92521 Winston Chung Global Energy Center, University of California, Riverside, California 92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California 92507
Alfredo A. Martinez-Morales
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California 92521 Winston Chung Global Energy Center, University of California, Riverside, California 92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California 92507
*
*(Email: [email protected])
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Abstract

Safety is one of the most crucial problems faced by the lithium-ion battery (LIBs) industry. In this work, we propose a strategy to avoid overcharging of a battery via the application of a solid-state combined cathode. The goal of this research is to produce LIBs with overcharge self-regulation capabilities. In order to achieve self-regulation functionality, 1,4-di-tert-butyl-2,5-dimethoxybenzene (DBB) is added to as-synthesized LiFePO4, post synthesis. DBB has a trigger voltage of 3.9 V. When this voltage is reached, DBB forms a reduced ion that is released into the electrolyte from the cathode side. The DBB ion transfers to the anode side where it oxidizes and transfers back to the cathode side. This process forms a redox shuttle and consumes the extra charges keeping the voltage at a safe level (i.e. 3.9 V). The DBB redox shuttle protects the LiFePO4-based LIBs with working voltage between 3.4 and 3.5 V. The cycleability of assembled batteries is tested using an Arbin Tester.

Keywords

energy storageenergetic materialenergy generation
Type
Articles
Information
MRS Advances , Volume 2 , Issue 8: Electrochemistry , 2017 , pp. 445 - 450
Copyright
Copyright © Materials Research Society 2017 

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References

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