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Progress and challenges for replacing n-methyl-2-pyrrolidone/polyvinylidene fluoride slurry formulations in lithium-ion battery cathodes

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Progress in Natural Science:Materials International 2024年第1期34卷 194-206页

作者： Sung Cik Mun Yeong Hoon Jeon Jong Ho Won Battery Materials Research Center LG Chem department of Energy Engineering Dankook University

With electric vehicles, energy storage systems, and portable electronic devices becoming increasingly popular, the demand for lithium-ion batteries has surged considerably. In the lithium-ion battery industry, n-methyl-2-pyrrolidone(NMP) is widely used as the solvent for cathode slurry, and polyvinylidene fluoride(PVDF) is used as the cathode binder. However, because of the harmful effect of NMP on the environment and human health, the use of NMP and PVDF for lithium-ion batteries will be highly regulated in the future. Therefore, developing eco-friendly alternatives is crucial for formulating systems using new solvents and binders. Despite numerous efforts, these alternatives have not been widely adopted across the lithium-ion battery industry. It is due to their limited ability to compete on price or performance to replace the traditional NMP/PVDF slurry formulations. This review investigates developments in the search for new solvents and binders that can be used in cathode slurry compositions. The new systems can potentially decrease energy consumption and manufacturing costs associated with NMP recovery, energy-intensive drying processes, and material expenses. We discuss key factors and technical challenges from earlier studies and compare them with the current, optimized formulations based on NMP and PVDF.

关键词： Lithium-ion battery Eco-friendly alternative Slurry formulation chemical regulation Binder performance

The use of computational thermodynamic for yttrium recovery from rare earth elements-bearing residue

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Journal of Rare Earths 2021年第2期39卷 201-207页

作者： Amilton Barbosa Botelho Junior Denise Crocce Romano Espinosa Jorge Alberto Soares Tenorio department of chem ical Engineering Polytechnic SchoolUniversity of Sao PauloSao PauloBrazil

The rare earth elements are considered critical metals,due to the risk of supply *** recycling of waste electrical and electronic equipment can be an alternative to supply the rare earth *** processes have been developed,and by aqueous media is the most prominent,which makes possible the extraction and separation of elements even in low concentration(traces).As an example of thermal processing,the use of thermodynamic simulations might benefit the metal extraction in hydrometallurgical *** this reason,the goal of this work is to evaluate the use of FactSage 7.2 software for the leaching of fluorescent lamp powders by sulfuric *** effect of concentration and temperature was *** comprise that the thermodynamic software wellpredicted the solid phase formed in all residues of leaching experiments-gypsum was predicted by the software and identified in XRD *** demonstrates that FactSage software can be explored for metals extraction in aqueous media,being important for trace-elements *** extraction reaches up to 95%at 45℃using H_(2)SO_(4)2 mol/L.

关键词： Yttrium Lanthanum Cerium WEEE FactSage Rare earths

The Deactivation of Nickel Hydroxide to Hypophosphite Electrooxidation on a Nickel Electrode

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Chinese chemical Letters 2004年第12期15卷 1483-1486页

作者： Yue ZENG Min MO Jian Long YI Xin Jun TANG Hui Xian WANG College of chemistry and chemical Engineering, Hunan Normal University, Changsha 410081 College of chemistry and chemical Engineering, Tianjin University, Tianjin 300072 department of chemistry, Hunan Agriculture University,Changsha 410128 Coll. of chem. and chem. Engineering Hunan Normal University Changsha 410081 China Coll. of chem. and chem. Engineering Tianjin University Tianjin 300072 China department of chemistry Hunan Agriculture University Changsha 410128 China

The deactivation of nickel hydroxide to the electrooxidation of hypophosphite on anickel electrode was studied by means of in situ UV-Vis subtractive reflectance spectroscopy. Theexperimental results show that when the potential is lower than-1.0 V (SCE), the surfacc on nickelelectrode is free of nickel hydroxide, on which hypophosphite is active. When the potential movespositively to about-0.75V, two absorbency bands around 300 nm and 550 nm, which were ascribedto the formation of α-nickel hydroxide, were observed, nickel is oxidized to α-nickel hydroxide.Severe deactivation of the surface occurs when the nickel surface is covered with nickel hydroxide,which separates the hypophosphite ion from nickel substrate.

关键词： Hypophosphite electrooxidation deactivation nickel hydroxide in situ UV-Vis spectroscopy.

Structure of the Manganese (V) Complex-Mn·3/2(μ-DHBQ)·4H_2O·2Cl

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Chinese chemical Letters 2000年第7期11卷 645-648页

作者： Yi Xiang CHENG Mao Lin HU Ji Xin YUAN Yun Chu WANG(department of chemistry & chemical Engineering, Southeast University, Nanjing 210096 department of chemistry, Wenzhou Teachers College, Wenzhou 325003) Dept. of chem. and chem. Engineering Southeast University Nanjing 210096 China department of chemistry Wenzhou Teachers College Wenzhou 325003 China

The novel complex of Mn(V): Mn·3/2(μ -DHBQ)·4H2O·2Cl (where, H2DHBQ =2,5-dihydroxyl- 1,4-benzoquinone) was synthesized and its crystal structure has been determined by X-ray diffraction. The complex belongs to trigonal system with space group P3(# 147), a= 1 .415(2)nm, c=0.6552(4) nm, V=1 .1371(7) nm-3, Z=2, Dx=1.183 g/cm3, μ=7.37 cm-1, F(000)=408.00,R=0.041, Rw=0.046.

关键词： Manganese (V) crystal structure bridging ligand 2,5-dihydroxyl-1,4-benzoquinone

Spectrophotometric Investigation of Cadmium Complex Solutionwith m-Bromobenzenediazoaminoazobenzene

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Chinese chemical Letters 1999年第11期10卷 957-960页

作者： Hong Wen GAO Lei WANG Hao YE(School of chemistry and chemical Engineering, Anhui University, Hefei 230039)(department of chemistry, Huaibei Coal Teachers College, Huaibei 235000) Sch. of chem. and chem. Engineering Anhui University Hefei 230039 China department of chemistry Huaibei Coal Teachers College Huaibei 235000 China

The synthesis of a new ligand, m-bromobenzenediazoaminoazobenzene (m-BBDA) was carried out. The reaction between m-BBDA and cadmium(II) was sensitive at pH over 12 and in the presence of emulsifier OP. Because of the high interference of excess of ligand beta-correction theory was applied instead of the single wavelength method. This study gave the simple determination of the complex ratio, real molar absorptivity (epsilon) and step or cumulative stability constant (K).

关键词： beta-correction principle cadmium complex m-bromobenzenediazoaminoazobenzene

Pentacoordinated Spirophosphoranes from Amino Acid Sodium Salts

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Chinese chemical Letters 1997年第5期8卷 397-400页

作者： Hai Yan LU Nan Jing ZRANG Yu Fen ZRAO(Bioorganic Phosphorus chemistry Laboratory, Dcyartinen of chemistryTsinghua Uhiverslty, Beijing, 100084) Bioorg. Phosphorus chem. Laboratory Department of Chemistry Tsinghua University Beijing 100084 China

The reactions of 2-chloro-1,3,2-dioxaphospholane with various sodium salts of amino acids to afford the pentacoordinated spirophosphoranes containing amino acid were studied by NMR spectra techniques. The results showed that natural alpha-amino acids had greater ability than beta-amino acids to form the pentacoordinated species, which is important in the biosynthesis and prebiotic synthesis of of oligopeptides and proteins.

关键词： Pentacoordinated Spirophosphoranes from Amino Acid Sodium Salts Li

A Novel Synthesis of Methyl 4, 6-O-Benzylidene-α-D-Glucopyranoside 2, 3-Cyclic Phosphite Ethyl Ester

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Chinese chemical Letters 1999年第6期10卷 457-458页

作者： Jian Jun HU Yong JU Yu Fen ZHAO(Bioorganic Phosphorus chemistry Laboratory, department of chemisrty.Tsinghua University. Beijing. 100084) Bioorg. Phosphorus chem. Laboratory Department of Chemistry Tsinghua University Beijing 100084 China

A new compound. methyl 4. 6-O-benzylidene-a-D-glucopyranoside 2. 3-cyclicphosphite ethyl ester was synthesized via the reaction of methyl 4. 6-O-benzylidene-a-D-glucopyranoside and ethyl dichlorophosphite. Its structu... 详细信息

关键词： 2. 3-Cyclic glucopyranosyl phosphite ester synthesis structure determination

Differentiation Effect of Pentacoordinate Phosphorus on Carbohydrate Reaction

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Chinese chemical Letters 1999年第5期10卷 387-388页

作者： Yong JU Yi CHEN Yu Fen ZHAO (Bioorganic Phosphorus chemistry Laboratory. department of chemistry.Tsinghua University. Beijing 100084) Bioorg. Phosphorus chem. Laboratory Department of Chemistry Tsinghua University Beijing 100084 China

The reaction between D-glucose, D-ribose and 2, 2,2-trimethoxy-4, 5-diphenyl-2, 2-dihydro-1, 3, 2-dioxaphospholene were investigates by P-31 NMR and FAB-MS. The results showed that there were a lot of differences in the reactions via pentacoordinate phosphorus compound, and it should give it significant clue to the metabolism of carbohydrate phosphate in nature.

关键词： carbohydrate pentacoordinate oxyphosphorane biomimic mechanism

Electron Impact Mass Spectrometry of Acylaminotetraoxyphosphorane

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Chinese chemical Letters 1997年第7期8卷 629-632页

作者： Nan Jing ZHANG Hai Yan LU Xin CHEN Yu Fen ZHAO(Bioorganic Phosphorus chemistry Laboratory, department of chemistry Tsinghua University, Beijing 100084) Bioorg. Phosphorus chem. Laboratory Department of Chemistry Tsinghua University Beijing 100084 China

The electron impact ionization mass spectral fragmentations of a series of acylaminotetraoxyphosphoranes were investigated. The results showed that EIMS of such compounds exhibited very characteristic fragmentation pa... 详细信息

关键词： Mass Electron Impact Mass Spectrometry of Acylaminotetraoxyphosphorane Chen