Thermal simulation of large-scale lithium secondary batteries using a graphite–coke hybrid carbon negative electrode and LiNi0.7Co0.3O2 positive electrode

Effect of entropy change of lithium intercalation in cathodes and anodes on Li-ion battery thermal management

“…While data on LiCoO 2 , spinel LiMn 2 O 4 cathodes and graphite anode was readily available [4][5][6][7]9], only limited information was available on novel electrodes such as LiFePO 4 [8] and lithium titanates [7]. The entropy change of the full cell was computed from individual electrode data, while the full cell entropy change for LiCoO 2 -graphite was obtained from the literature [1].…”

“…The entropy change of the full cell was computed from individual electrode data, while the full cell entropy change for LiCoO 2 -graphite was obtained from the literature [1]. For some of the literature data, S was calculated from the ∂E/∂T values [5].…”

“…Measurement of individual electrode and full cell entropy change, along with computation of reversible and irreversible heat generation rates at various current densities is expected to contribute significantly to effective thermal management for large batteries. Various researchers have determined entropy change values for LiCoO 2 [4], LiCoO 2 modified with Ni [5], spinel LiMn 2 O 4 [6], Li 1.156 Mn 1.844 O 4 [7], LiFePO 4 [8], graphite [9], Li 4/3 Ti 5/3 O 4 spinel [7], and LiCoO 2 -graphite full cells [1]. From these data, it is apparent that certain cathode/anode couples can be conducive to lower rate of reversible heat generation due to cathode and anode entropy changes canceling out each other at a given SOC across the desired SOC range.…”

Thermal analysis of large-capacity LiFePO4 power batteries for electric vehicles

“…For large-scale cells, few studies on the numerical prediction of their thermal performances have been reported. To develop a 250 Wh-class LiNi 0.7 Co 0.3 O 2 battery cell (64 mm in diameter and 296 mm in height), Funahashi et al [16] developed a simple thermal model and validated its accuracy using measured temperatures.…”

Electrochemical properties of LiNi0.8Co0.15Al0.05O2–graphene composite as cathode materials for lithium-ion batteries

“…Among the various possible cathode alternatives that have been pursued, lithium nickel cobalt mixed oxides have been suggested as one of the promising candidates to replace LiCoO 2 on the basis of their high capacity and raw material cost [6][7][8]. Unfortunately, the use of nickel-rich cathodes in practical lithium-ion cells has generally been plagued by severe capacity fading and increased resistance, arising from structural instability [9,10].…”