TY - JOUR

T1 - Switchable resistance conducting-polymer layer for Li-ion battery overcharge protection

AU - Белецкий, Евгений Всеволодович

AU - Федорова, Анна Алексеевна

AU - Лукьянов, Даниил Александрович

AU - Кальнин, Арсений Юрьевич

AU - Ершов, Валентин Александрович

AU - Данилов, Степан Егорович

AU - Спиридонова, Дарья Валерьевна

AU - Алексеева, Елена Валерьевна

AU - Левин, Олег Владиславович

N1 - Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/4/1

Y1 - 2021/4/1

N2 - Overcharge of Li-ion cells is one of the causes of severe safety problems. Despite many efforts to prevent development of adverse processes at overcharge conditions by using Battery Management Systems, chemical protection remains the most fail-safe solution. In the present work we describe novel approach to overcharge protection of Li-ion cells, which is provided by use of electrically conductive polymer that change electrical conductivity from conductive to insulating stage. The layer of such polymer, deposited between the LiFePO 4 -based cathode material and current collector, increase the electrode resistance in more than 20 times when the cell voltage exceeds 4.2 V, acting as a chemical circuit breaker. At 5 V overcharge it allows reversible charge-discharge of the cell without developing of adverse process, while at 6 V overcharge it terminates the cell operation before electrolyte decomposition starts, reducing amount of evolved gases in 4 times compared to non-protected cell.

AB - Overcharge of Li-ion cells is one of the causes of severe safety problems. Despite many efforts to prevent development of adverse processes at overcharge conditions by using Battery Management Systems, chemical protection remains the most fail-safe solution. In the present work we describe novel approach to overcharge protection of Li-ion cells, which is provided by use of electrically conductive polymer that change electrical conductivity from conductive to insulating stage. The layer of such polymer, deposited between the LiFePO 4 -based cathode material and current collector, increase the electrode resistance in more than 20 times when the cell voltage exceeds 4.2 V, acting as a chemical circuit breaker. At 5 V overcharge it allows reversible charge-discharge of the cell without developing of adverse process, while at 6 V overcharge it terminates the cell operation before electrolyte decomposition starts, reducing amount of evolved gases in 4 times compared to non-protected cell.

UR - http://www.scopus.com/inward/record.url?scp=85100417534&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/df7939bd-8391-3c56-96a8-ef85830c8156/

U2 - 10.1016/j.jpowsour.2021.229548

DO - 10.1016/j.jpowsour.2021.229548

M3 - Article

VL - 490

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 229548

ER -