《Microstructural observations of “”Single Crystal”” positive electrode materials before and after long term cycling by cross-section scanning electron microscopy》 was written by Liu, Yulong; Harlow, Jessie; Dahn, Jeff. Application In Synthesis of Vinylene carbonate And the article was included in Journal of the Electrochemical Society in 2020. The article conveys some information:
Single crystal LiNi0.5Mn0.3Co0.2O2 (SC532), LiNi0.6Mn0.2Co0.2O2 (SC622) and LiNi0.8Mn0.1Co0.1O2 (SC811) electrodes were retrieved from heavily cycled com.-grade pouch cells at 4.3 V for cross-section SEM (SEM). SEM images indicated the single crystals showed very little microcracking, thought by many researchers to be one of the main reasons for cell degradation when polycrystalline materials are used. SEM images of electrodes from heavily cycled cells were compared to those from fresh cells which showed little visual difference. Parallel microcracks within very few single crystal particles were observed for both fresh and heavily cycled materials and are thought to be caused during the electrode calendaring process. It is believed by the authors that single crystal materials are highly promising pos. electrode materials for high energy d. and long cycle life lithium-ion cells. In the experiment, the researchers used Vinylene carbonate(cas: 872-36-6Application In Synthesis of Vinylene carbonate)
Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Application In Synthesis of Vinylene carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics