244761-29-3Relevant articles and documents
Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li1.16[Mn0.75Ni0.25]0.84O2 cathode
Lian, Fang,Li, Yang,He, Yi,Guan, Hongyan,Yan, Kun,Qiu, Weihua,Chou, Kuo-Chih,Axmann, Peter,Wohlfahrt-Mehrens, Margret
, p. 86763 - 86770 (2015)
Lithium bis(oxalato)borate (LiBOB) was synthesized via a novel rheological phase reaction method without any recrystallization procedure. The purity of the as-obtained LiBOB has been identified in comparison with the commercial sample and our sample prepared from solid-state reaction method. The results of XRD, ICP, and 11B NMR demonstrate that high pure LiBOB has been synthesized via rheological phase reaction method with significantly simplified synthetic process. Moreover, LiBOB sample has been investigated as electrolyte additive to improve the electrochemical performances of high-energy lithium-rich layered oxide. The cycling performances imply that 0.03 M and 0.05 M LiBOB additive can mitigate discharge voltage fade and enhance the cycle stability of Li1.16[Mn0.75Ni0.25]0.84O2 material. The CV, EIS and XPS data indicate that LiBOB oxidizes at ~4.3 V (vs. Li/Li+) on the cathode surface during the first charge to form a specific SEI layer with larger amount of organic species and fairly less content of LiF, which decreases the interfacial polarization and protects the active material from surface degradation, thereby mitigates the voltage-fade of Li-rich cathode.
Preparation method of lithium bis(oxalato)borate
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Paragraph 0058-0075, (2020/05/30)
The invention discloses a preparation method of lithium bis(oxalato)borate. The preparation method mainly comprises: synthesizing a lithium bis(oxalato)borate crude product, concentrating, crystallizing and purifying, and specifically comprises the following steps: weighing and uniformly mixing elemental boron, lithium powder and anhydrous oxalic acid to obtain a raw material mixture; putting theraw material mixture into a ball mill, performing a normal-pressure reaction for 2-6 h, then adding an organic solvent, and performing wet grinding to obtain a solution containing the lithium bis(oxalato)borate crude product; and concentrating, crystallizing and filtering the solution containing the lithium bis(oxalato)borate crude product, and then drying to obtain the lithium bis(oxalato)borate.Production links are few, purification is convenient, the purity of the prepared lithium bis(oxalato)borate product can reach 99.99%, the moisture content is lower than 10 ppm, and the production requirements of lithium ion battery electrolytes are met.
Preparation method of bis(oxalate)borate
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Paragraph 0083; 0086-0093; 0134-0150; 0154, (2020/01/12)
The invention relates to the technical field of preparation of lithium battery electrolyte additives, in particular to a preparation method of bis(oxalate)borate. The preparation raw materials of thebis(oxalate)borate at least comprise dialkyl silicon oxalate and MBF4, wherein M is selected from any one of Li, Na, K, Rb and Cs. The bis(oxalate)borate is prepared from at least dialkyl oxalate estersil and MBF4, wherein M is selected from any one of Li, Na, K, Rb and Cs. According to the preparation method of the bis(oxalate)borate, the conversion rate of a target product is higher, the reaction product is single, and almost no by-product is generated; water and oxalic acid are not introduced in the technological process, the reaction and purification process is simple and convenient, and the product quality is easy to control; and almost no three wastes are generated in the implementation process, and a produced recovered solvent and a filtered mother liquor can be repeatedly used after distillation.
Preparation method and purification method of compound comprising at least one cyclic ligand structure
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Paragraph 0211-0214, (2019/03/29)
The invention discloses a preparation method and a purification method of a compound comprising at least one cyclic ligand structure. The compound comprising the at least one cyclic ligand structure comprises 1-2 cyclic ligands in different structures, namely a cyclic ligand containing La and/or a cyclic ligand containing Lb, wherein the cyclic ligand containing La comprises one of sulfuryl (-SO2-), sulfinyl (-SO-) and carbonyl. The compound can serve as electrolyte lithium salt of a lithium ion battery independently, and is dissolved in an organic solvent for preparing an electrolyte solutionof the lithium ion battery; or, the compound and the lithium salt are dissolved in the organic solvent to prepare the electrolyte solution of the lithium ion battery; and the electrolyte solution canobviously improve internal resistance of the lithium ion battery and has an effect on cycle performance of the battery.