Picosecond　laser

Examples of picosecond laser processing

electrochimica acta
2019/11/21 / Last updated : 2021/5/23 wired
Technical data / papers

An improved pre-lithiation of graphite anodes using through-holed cathode and anode electrodes in a laminated lithium ion battery

To actually compensate for the "irreversible capacity (i.e., active lithium loss)" normally observed in the first charge/discharge cycle of lithium-ion batteries (LIB), for example, caused by solid electrolyte intermediate phase (SEI) formation, so-called pre-lithiumization was applied to graphite anodes in laminated cells composed of three graphite negative electrodes and three LFP (lithium iron phosphate) positive electrodes.　WIRED Co., Ltd.

Electrochemical Ssociety of Japan
2019/10/12 / Last updated : 2021/5/23 wired
Technical data / papers

An Improved High-rate Discharging Performance of “Unbalanced” LiFePO4 Cathodes with Different LiFePO4 Loadings by a Grid-patterned Micrometer Size-holed Electrode Structuring

Degraded charge / discharge capacity cells in speed performance tests of lithium iron phosphate (LFP) positive electrodes with different loads of active material on both sides of the stacked current collectors were not actually observed at low C rates. did. However, rate performance data obtained at high C rates showed that imbalances in the loading of active positive electrode materials on both sides of the Al current collector caused significant volume reduction. It was found that using picoseconds to laser drill the positive electrode with a micrometer-sized grid pattern can prevent the capacitance loss observed at high C rates. Wired Co., Ltd.