title: Effect of Temperature on the Aging rate of Li Ion Battery Operating above Room Temperature.
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.
authors.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.
authors.forename: Feng
authors.initials: F
authors.lastname: Leng
authors.affiliation: 1] TUM CREATE PTE LTD, 1 Create Way, #10-02 Create Tower, Singapore 138602, Singapore [2] Chang Gung University, Department of Electronics Engineering, Taoyuan, TaiWan 259 Wen-Hwa 1st Road, Kwei-Shan Tao-Yuan, Taiwan, 333, R.O.C.
authors.forename: Cher Ming
authors.initials: CM
authors.lastname: Tan
authors.affiliation: Center for Advanced Life Cycle Engineering (CACE), University of Maryland, College Park, MD 20740, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Pecht