Influence of Initial Porosity on the Expansion Behavior of Electrodes in Lithium-Ion Batteries
نویسندگان
چکیده
When charging or discharging a lithium-ion-battery (LIB), lithiation delithiation of the electrodes takes place. Especially in case anode active materials, often leads to significant volume increase. The latter can cause rearrangement particles. Although volumetric changes state-of-the-art cathode materials have been found be smaller than for anodes, they remain relevant. combined anodes and cathodes are an important factor influencing lifetime LIBs. An electrochemical dilatometer was used measure thickness change various electrode under minimal constant pressure (≈ 16 kPa): graphite, silicon-graphite (SiG) composite electrodes, high-voltage spinel lithium-nickel-manganese-oxide (HVS-LNMO). factors investigated included initial porosity particle shape silicon content electrodes. Regarding all is shown correlate negatively with irreversible during cycles. each over post-formation cycles, regardless porosity. Spherical particles graphite resulted slightly higher flake-type SiGs increased linearly content.
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2023
ISSN: ['0013-4651', '1945-7111']
DOI: https://doi.org/10.1149/1945-7111/acd2fe