CeF 3 -modified LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode material for high-voltage Li-ion batteries
Source abstract
Abstract
Abstract A facile chemical deposition method has been adopted to prepare cerium fluoride (CeF 3 ) surface modified LiNi 1/3 Co 1/3 Mn 1/3 O 2 as cathode material for lithium-ion batteries. Structure analyses reveal that the surface of LiNi 1/3 Co 1/3 Mn 1/3 O 2 particles is uniformly coated by CeF 3 . Electrochemical tests indicate that the optimal CeF 3 content is 1 wt%. The 1 wt% CeF 3 -coated LiNi 1/3 Co 1/3 Mn 1/3 O 2 can deliver a discharge capacity of 107.1 mA h g −1 even at 5 C rate, while the pristine does only 57.3 mA h g −1 . Compared to the pristine, the 1 wt% CeF 3 -coated LiNi 1/3 Co 1/3 Mn 1/3 O 2 exhibits the greatly enhanced capacity and cycling stability in the voltage range of 3.0–4.5 V, which suggests that the CeF 3 coating has the positive effect on the high-voltage application of LiNi 1/3 Co 1/3 Mn 1/3 O 2 . According to the analyses from electrochemical impedance spectra, enhanced electrochemical performance is mainly because the stable CeF 3 coating layer can prevent the HF-containing electrolyte from continuously attacking the LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode and retard the passivating layer growth on the cathode.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
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