Since lithium-ion batteries have been put into use,the recession of work cycle efficiency at low temperatures has received widespread attention.In this paper,we investigated the effect of low temperature(−5℃,0℃,5℃)...Since lithium-ion batteries have been put into use,the recession of work cycle efficiency at low temperatures has received widespread attention.In this paper,we investigated the effect of low temperature(−5℃,0℃,5℃)environments on the performance of lithium-ion batteries,which are well-known for their excellent discharge performance,cycle life,and safety.However,lithium-ion batteries exhibit significant capacity degradation at low temperatures,especially at 0℃,losing availability after only 10 cycles.Therefore,we conducted cycle degradation tests at 1C discharge and 100% charge-discharge conditions.In this paper,we analyzed the surface morphology,structure,and elemental composition of the positive and negative electrodes before and after the aging process by disassembling theminto half-cells and using three physical characterization techniques:scanning electronmicroscopy(SEM),energy dispersive spectroscopy(EDS),and X-ray diffraction(XRD).Our study identifies the temperature range for accelerated aging,which provides guidance for the optimal use of lithium-ion batteries in low temperature environments,thus contributing to the rational utilization and enhanced the performance of lithium-ion batteries at low temperatures.展开更多
基金supported by the Zhuhai Science and Technology Program in the field of Social Development program of China under Grant ZH22036201210039PWC.
文摘Since lithium-ion batteries have been put into use,the recession of work cycle efficiency at low temperatures has received widespread attention.In this paper,we investigated the effect of low temperature(−5℃,0℃,5℃)environments on the performance of lithium-ion batteries,which are well-known for their excellent discharge performance,cycle life,and safety.However,lithium-ion batteries exhibit significant capacity degradation at low temperatures,especially at 0℃,losing availability after only 10 cycles.Therefore,we conducted cycle degradation tests at 1C discharge and 100% charge-discharge conditions.In this paper,we analyzed the surface morphology,structure,and elemental composition of the positive and negative electrodes before and after the aging process by disassembling theminto half-cells and using three physical characterization techniques:scanning electronmicroscopy(SEM),energy dispersive spectroscopy(EDS),and X-ray diffraction(XRD).Our study identifies the temperature range for accelerated aging,which provides guidance for the optimal use of lithium-ion batteries in low temperature environments,thus contributing to the rational utilization and enhanced the performance of lithium-ion batteries at low temperatures.
