Choe, Chan-Yang Jung, Woo-Sang Byeon, Jai-Won 2024-01-20T08:00:32Z 2024-01-20T08:00:32Z 2021-09-05 2015-02 1345-9678 https://pubs.kist.re.kr/handle/201004/125824 Acoustic Emission (AE) technique was employed for evaluating charge/discharge damage in a lithium-ion battery. A coin-type battery of lithium cobalt oxide/carbon electrodes was used for acoustic monitoring during accelerated charge/discharge cycle test. A number of AE signals were successfully detected during charge/discharge. Microstructural observation of the electrodes after the cycle test revealed mechanical damage such as micro-cracking of the cathode and chemical damage such as solid electrolyte interphase (SET) layer formed on the anode. The detected AE signals were classified into two distinct types (i.e., type 1 and type 2) based on the AE waveform parameters (i.e., duration and amplitude). The main frequency component of the type 1 signal with short duration and high amplitude was in the range of 121-160kHz, whereas the frequency of type 2 signals with long duration and low amplitude was between 81 and 120 kHz. Active AE source of type 1 and type 2 signal was attributed to micro-cracking in cathode and gas bubble accompanied by SET layer formation, on anode, respectively. These results demonstrate the feasibility of the AE technique for the evaluation of charge/discharge degradation of secondary battery. English JAPAN INST METALS & MATERIALS X-RAY-DIFFRACTION ION BATTERIES PITTING CORROSION INTERCALATION INTERFACE TOOL Damage Evaluation in Lithium Cobalt Oxide/Carbon Electrodes of Secondary Battery by Acoustic Emission Monitoring Article 10.2320/matertrans.M2014396 1 MATERIALS TRANSACTIONS, v.56, no.2, pp.269 - 273 MATERIALS TRANSACTIONS 56 2 269 273 scie scopus 000351650100017 2-s2.0-84921727125 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article X-RAY-DIFFRACTION ION BATTERIES PITTING CORROSION INTERCALATION INTERFACE TOOL acoustic emission lithium-ion battery in-situ evaluation degradation micro-crack