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Effect of Temperature on the Aging rate of Li Ion Battery Operating above Room Temperature.

Leng F, Tan CM, Pecht M - Sci Rep (2015)

Bottom Line: However, the comprehensive effects of temperature on the cyclic aging rate of LiB have yet to be found.In particular, the formation and modification of the surface films on the electrodes as well as structural/phase changes of the LCO electrode, as reported in the literatures, are found to be the main contributors to the increasing degradation rate of the maximum charge storage of LiB with temperature for the specific operating temperature range.Larger increases in the Warburg elements and cell impedance are also found with cycling at higher temperature, but they do not seriously affect the state of health (SoH) of LiB as shown in this work.

View Article: PubMed Central - PubMed

Affiliation: 1] Nanyang Technological University, School of Electrical Electronics Engineering, Blk S2.1, 50 Nanyang Avenue, Singapore 639798, Singapore [2] TUM CREATE PTE LTD, 1 Create Way, #10-02 Create Tower, Singapore 138602, Singapore [3] Global Energy Quality And Reliability Technology (G.E.Q.A.R.T). PTE.LTD, Sims Residence, 8 Lorong, 29 Geylang #06-12, Singapore 387882, Singapore.

ABSTRACT
Temperature is known to have a significant impact on the performance, safety, and cycle lifetime of lithium-ion batteries (LiB). However, the comprehensive effects of temperature on the cyclic aging rate of LiB have yet to be found. We use an electrochemistry-based model (ECBE) here to measure the effects on the aging behavior of cycled LiB operating within the temperature range of 25 °C to 55 °C. The increasing degradation rate of the maximum charge storage of LiB during cycling at elevated temperature is found to relate mainly to the degradations at the electrodes, and that the degradation of LCO cathode is larger than graphite anode at elevated temperature. In particular, the formation and modification of the surface films on the electrodes as well as structural/phase changes of the LCO electrode, as reported in the literatures, are found to be the main contributors to the increasing degradation rate of the maximum charge storage of LiB with temperature for the specific operating temperature range. Larger increases in the Warburg elements and cell impedance are also found with cycling at higher temperature, but they do not seriously affect the state of health (SoH) of LiB as shown in this work.

No MeSH data available.


Related in: MedlinePlus

A prismatic cell used in this work.(Picture taken by M. Pecht at the CALCE–University of Maryland).
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f1: A prismatic cell used in this work.(Picture taken by M. Pecht at the CALCE–University of Maryland).

Mentions: The LiB studied in this work is a prismatic cell from Sony. Its specifications are shown in Table 1, and Fig. 1 shows a photo of the cells used in this work. The charge and discharge cycles of LiB were performed using an Arbin BT2000 battery testing system in the Center for Advanced Life Cycle Engineering (CALCE) at the University of Maryland, College Park. The fresh cells are firstly discharged to the cut-off voltage of 2.7 V as specified in the battery specification which corresponds to 100% depth of discharge. A standard constant current/constant voltage (CCCV) charging profile with a fixed current rate of 0.5C until the voltage reach 4.2 V, followed by maintaining at 4.2 V until the charging current dropped to below 0.05A, was used for all the cells under study. The cells are rested for 120s after charging for stabilization of its terminal voltage.


Effect of Temperature on the Aging rate of Li Ion Battery Operating above Room Temperature.

Leng F, Tan CM, Pecht M - Sci Rep (2015)

A prismatic cell used in this work.(Picture taken by M. Pecht at the CALCE–University of Maryland).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526891&req=5

f1: A prismatic cell used in this work.(Picture taken by M. Pecht at the CALCE–University of Maryland).
Mentions: The LiB studied in this work is a prismatic cell from Sony. Its specifications are shown in Table 1, and Fig. 1 shows a photo of the cells used in this work. The charge and discharge cycles of LiB were performed using an Arbin BT2000 battery testing system in the Center for Advanced Life Cycle Engineering (CALCE) at the University of Maryland, College Park. The fresh cells are firstly discharged to the cut-off voltage of 2.7 V as specified in the battery specification which corresponds to 100% depth of discharge. A standard constant current/constant voltage (CCCV) charging profile with a fixed current rate of 0.5C until the voltage reach 4.2 V, followed by maintaining at 4.2 V until the charging current dropped to below 0.05A, was used for all the cells under study. The cells are rested for 120s after charging for stabilization of its terminal voltage.

Bottom Line: However, the comprehensive effects of temperature on the cyclic aging rate of LiB have yet to be found.In particular, the formation and modification of the surface films on the electrodes as well as structural/phase changes of the LCO electrode, as reported in the literatures, are found to be the main contributors to the increasing degradation rate of the maximum charge storage of LiB with temperature for the specific operating temperature range.Larger increases in the Warburg elements and cell impedance are also found with cycling at higher temperature, but they do not seriously affect the state of health (SoH) of LiB as shown in this work.

View Article: PubMed Central - PubMed

Affiliation: 1] Nanyang Technological University, School of Electrical Electronics Engineering, Blk S2.1, 50 Nanyang Avenue, Singapore 639798, Singapore [2] TUM CREATE PTE LTD, 1 Create Way, #10-02 Create Tower, Singapore 138602, Singapore [3] Global Energy Quality And Reliability Technology (G.E.Q.A.R.T). PTE.LTD, Sims Residence, 8 Lorong, 29 Geylang #06-12, Singapore 387882, Singapore.

ABSTRACT
Temperature is known to have a significant impact on the performance, safety, and cycle lifetime of lithium-ion batteries (LiB). However, the comprehensive effects of temperature on the cyclic aging rate of LiB have yet to be found. We use an electrochemistry-based model (ECBE) here to measure the effects on the aging behavior of cycled LiB operating within the temperature range of 25 °C to 55 °C. The increasing degradation rate of the maximum charge storage of LiB during cycling at elevated temperature is found to relate mainly to the degradations at the electrodes, and that the degradation of LCO cathode is larger than graphite anode at elevated temperature. In particular, the formation and modification of the surface films on the electrodes as well as structural/phase changes of the LCO electrode, as reported in the literatures, are found to be the main contributors to the increasing degradation rate of the maximum charge storage of LiB with temperature for the specific operating temperature range. Larger increases in the Warburg elements and cell impedance are also found with cycling at higher temperature, but they do not seriously affect the state of health (SoH) of LiB as shown in this work.

No MeSH data available.


Related in: MedlinePlus