Guangzhou Tinci Materials Technology Co.

Guangzhou, China

Guangzhou Tinci Materials Technology Co.

Guangzhou, China

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Chen Z.,Harbin Institute of Technology | Dai C.,Harbin Institute of Technology | Wu G.,Los Alamos National Laboratory | Nelson M.,Los Alamos National Laboratory | And 4 more authors.
Electrochimica Acta | Year: 2010

Li3V2(PO4)3/C composite cathode material was synthesized via carbothermal reduction process in a pilot scale production test using battery grade raw materials with the aim of studying the feasibility for their practical applications. XRD, FT-IR, XPS, CV, EIS and battery charge-discharge tests were used to characterize the as-prepared material. The XRD and FT-IR data suggested that the as-prepared Li 3V2(PO4)3/C material exhibits an orderly monoclinic structure based on the connectivity of PO4 tetrahedra and VO6 octahedra. Half cell tests indicated that an excellent high-rate cyclic performance was achieved on the Li3V 2(PO4)3/C cathodes in the voltage range of 3.0-4.3 V, retaining a capacity of 95% (96 mAh/g) after 100 cycles at 20C discharge rate. The low-temperature performance of the cathode was further evaluated, showing 0.5C discharge capacity of 122 and 119 mAh/g at -25 and -40 °C, respectively. The discharge capacity of graphite//Li3V 2(PO4)3 batteries with a designed battery capacity of 14 Ah is as high as 109 mAh/g with a capacity retention of 92% after 224 cycles at 2C discharge rates. The promising high-rate and low-temperature performance observed in this work suggests that Li3V 2(PO4)3/C is a very strong candidate to be a cathode in a next-generation Li-ion battery for electric vehicle applications. © 2010 Elsevier Ltd All rights reserved.


Zuo X.,South China Normal University | Wu J.,South China Normal University | Fan C.,South China Normal University | Lai K.,South China Normal University | And 2 more authors.
Electrochimica Acta | Year: 2014

In order to overcome the severe capacity fading of LiMn2O 4/graphite cells cycled at elevated temperature, methylene methanedisulfonate (MMDS) is newly evaluated as an electrolyte additive to improve the thermal stability of LiMn2O4 cathode. The cell using 1.0 mol L-1LiPF6 -EC/EMC/DMC (1:1:1, weight ratio) with 0.5 wt.% MMDS additive keeps 79.2% of initial capacity after100 cycles at 60 °C, whereas it is only 52.7% for the cell without additive. After the storage at 85°C for 24 h, the cell with 0.5 wt.% MMDS additive exhibits higher discharge capacity retention (82.5%) than the cell without additive (71.8%), and the change of thickness, resistance and discharge voltage plateaus decrease. The effects of the additive are characterized by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), transmission electron microscopy (TEM), as well as electrochemical performance tests. These results suggest that MMDS additive can form better electrochemical and thermal stability of surface film on the LiMn2O4 electrode, which reduces both the decomposition of the electrolyte and the dissolution of Mn ion in the electrolyte at elevated temperature, thus leads to the obvious improvement on the thermal stability of LiMn2O4 cathode. © 2014 Elsevier Ltd.


Ying Y.,Guangzhou Tinci Materials Technology Co. | Zhang R.-X.,Guangzhou Tinci Materials Technology Co.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2011

The application research situation of several cationic natural polymers in papermaking were introduced. Cationization conditions, degree of substitution and application effect of some natural polymers, like guar gum, cellulose, hemicelluloses, and lignin, starch, etc, were analyzed. The cationic natural polymers have more advantages such as cost effective, renewable, environmental friendly, etc, as additive in papermaking.


Liu S.,Central South University | Huang K.,Central South University | Liu J.,Guangzhou Tinci Materials Technology Co. | Li Y.,Guangzhou Tinci Materials Technology Co. | And 3 more authors.
Journal of Solid State Electrochemistry | Year: 2012

Electrolytes of 1 M blend salts (LiPF 6 and tetraethylammonium tetrafluoroborate, Et 4NBF 4) have been investigated in supercapacitor battery system with composite LiMn 2O 4 and activated carbon (AC) cathode, and Li 4Ti 5O 12 anode. The results obtained with the blend salts electrolytes are compared with those obtained with cells build using standard 1 M LiPF 6 dissolved in ethylene carbonate+dimethyl carbonate+ethyl (methyl) carbonate (EC+DMC+EMC, 1:1:1 wt.%) as electrolyte. It is found that the blend salts electrolyte performs better on both electrochemical and galvanostatic cycling stability, especially cycled at 4 C rate. When the concentration of LiPF 6 is 0.2 M and Et 4NBF 4 is 0.8 M, the capacity retention of the battery is 96.23% at 4 C rate after 5,000 cycles, much higher than that of the battery with standard 1 M LiPF 6 electrolyte, which is only 62.35%. These results demonstrate that the blend salts electrolyte can improve the galvanostatic cycling stability of the super-capacity battery. Electrolyte of 0.2 M LiPF 6+0.8 M Et 4NBF 4 in EC+DMC+EMC (1:1:1 wt.%) is a promising electrolyte for (LiMn 2O 4+AC)/Li 4Ti 5O 12. © 2011 Springer-Verlag.


Fu M.H.,Central South University | Huang K.L.,Central South University | Liu S.Q.,Central South University | Liu J.S.,Guangzhou Tinci Materials Technology Co. | Li Y.K.,Guangzhou Tinci Materials Technology Co.
Journal of Power Sources | Year: 2010

Lithium difluoro(oxalato)borate (LiODFB) was investigated as a lithium salt for non-aqueous electrolytes for LiMn2O4 cathode in lithium-ion batteries. Linear sweep voltammetry (LSV) tests were used to examine the electrochemical stability and the compatibility between the electrolytes and LiMn2O4 cathode. Through inductively coupled plasma (ICP) analysis, we compared the amount of Mn2+ dissolved from the spinel cathode in 1 mol L-1 LiPF6/EC + PC + EMC (1:1:3 wt.%) and 1 mol L-1 LiODFB/EC + PC + EMC (1:1:3 wt.%). AC impedance measurements and scanning electron microscopy (SEM) analysis were used to analyze the formation of the surface film on the LiMn2O4 cathode. These results demonstrate that ODFB anion can capture the dissolution manganese ions and form a denser and more compact surface film on the cathode surface to prevent the continued Mn2+ dissolution, especially at high temperature. It is found that LiODFB, instead of LiPF6, can improve the capacity retention significantly after 100 cycles at 25 °C and 60 °C, respectively. LiODFB is a very promising lithium salt for LiMn2O4 cathode in lithium-ion batteries. © 2009 Elsevier B.V. All rights reserved.


Zuo X.,South China Normal University | Fan C.,South China Normal University | Liu J.,Guangzhou Tinci Materials Technology Co. | Xiao X.,South China Normal University | And 2 more authors.
Journal of Power Sources | Year: 2013

This study demonstrates that tris(trimethylsilyl)borate (TMSB) additive in the electrolyte can dramatically improve the cycling performance of LiNi0.5Co0.2Mn0.3O2/graphite cell at higher voltage operation. And the effects of this additive are characterized by linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). In the voltage range of 3.0-4.4 V, LiNi0.5Co0.2Mn0.3O2/graphite cell with TMSB in the electrolyte retains about 92.3% of its initial capacity compared to the cell without additive in the electrolyte that retains only 28.5% of its initial capacity after 150 cycles, showing the promising prospect of TMSB at higher voltage. The enhanced cycling performance is attributed to the thinner film originated from TMSB on the LiNi0.5Co0.2Mn0.3O2 and the combination of TMSB with PF6 - and F- in the electrolyte, which not only protects the undesirable decomposition of EC solvents but also results in lower interfacial impedance. © 2012 Elsevier B.V. All rights reserved.


Yu M.,Sun Yat Sen University | Zhai T.,Sun Yat Sen University | Lu X.,Sun Yat Sen University | Chen X.,Sun Yat Sen University | And 7 more authors.
Journal of Power Sources | Year: 2013

We reported the synthesis of large-area manganese oxide nanorods (MONRAs) on carbon fabric and their implementation as flexible supercapacitors. Electrochemical measurements demonstrated that MONRAs exhibited a high capacitance (678 F g-1 at a current density of 0.3 A g-1) with high flexibility and excellent cycle performance (less than 3% capacitance loss after 10,000 cycles). Furthermore, the fabricated solid-state devices based on these MONRAs electrodes exhibited good electrochemical performance and could power a red LED well for about 5 min after charging at 0.5 mA cm-2 for 30 s, with an energy utilization efficiency of about 80%. These findings show that MONRAs are a kind of very promising electrode material for flexible supercapacitors. Copyright © 2013 Published by Elsevier B.V. All rights reserved.


Zuo X.,South China Normal University | Fan C.,South China Normal University | Xiao X.,South China Normal University | Liu J.,Guangzhou Tinci Materials Technology Co. | Nan J.,South China Normal University
Journal of Power Sources | Year: 2012

In order to overcome the capacity fading of LiCoO 2/graphite Lithium-ion batteries (LIBs) cycled in the voltage range of 3.0-4.5 V (vs. Li/Li +), methylene methanedisulfonate (MMDS) is newly evaluated as an electrolyte additive. The linear sweep voltammetry (LSV) and cyclic voltammetry (CV) indicate that MMDS has a lower oxidation potential in the mixed solvents of ethylene carbonate (EC) and ethyl methyl carbonate (EMC), and participates in the formation process of the cathode electrolyte interface (CEI) film. With the addition of 0.5 wt.% MMDS into the electrolyte, the capacity retention of the LiCoO 2/graphite cells cycled in 3.0-4.5 V is significantly increased from 32.0% to 69.6% after 150 cycles, and the rate capacity is also improved compared with the cells without MMDS additive in the electrolyte, showing the promising prospect in the electrolyte. In addition, the results of electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) demonstrate that the enhanced electrochemical performances of the cells can be ascribed to the modification of components of cathodes surface layer in the presence of MMDS, which resulting the suppression of the electrolyte oxidized decomposition and the improvement of CEI conductivity. © 2012 Elsevier B.V. All rights reserved.


Zuo X.,South China Normal University | Fan C.,South China Normal University | Xiao X.,South China Normal University | Liu J.,Guangzhou Tinci Materials Technology Co. | Nan J.,South China Normal University
ECS Electrochemistry Letters | Year: 2012

Methylene methanedisulfonate (MMDS) is evaluated as a new electrolyte additive for improving the cycling performance of the LiNi0.5Co0.2Mn0.3O2/ graphite cells cycled in the voltage range of 3.0-4.4 V.With the addition of 0.5 wt% MMDS in the electrolyte, the capacity retention of the cells increases from 70.7% to 94.1% after 100 cycles in 3.0-4.4 V, but has no difference in 3.0-4.2 V. The enhanced cycling performance of the cells with MMDS additive is ascribed to the surface modification of LiNi0.5Co0.2Mn0.3O2 cathode, which not only improves the conductivity of cathode electrolyte interface film but also suppresses the solvent decomposition at high voltage. © 2012 The Electrochemical Society.


Trademark
Guangzhou Tinci Materials Technology Co. and Guangzhou Tinci Materials Technology; Co. | Date: 2011-10-04

Chemical surfactant, namely, cationic surfactants as raw materials for use in the manufacture of industrial products, consumer and household products; Chemical additives for use in the manufacture of cosmetic, pharmaceuticals and food; Wetting agents for use in the manufacture of cosmetics; Silicon fluids in the nature of silicon oil; Silicone, namely, silicone resins and silica gel; Functionalized silicones for use in the manufacture of personal care and cosmetic compositions; Cationic conditioner for industrial purpose, namely, fatty-acid based diesel and gasoline fuel conditioners and chemical soil conditioners; Chemical thickeners for use in the manufacture of cosmetics; Cationic conditioner for industrial purpose, namely, cationic chemical conditioners for use in the manufacture of hair shampoo; Glutamic acid based conditioner as raw materials for use in the manufacture of cosmetics; Lipids used in the manufacture of cosmetics, beverages, food products and food supplements; Emollient used as an ingredient in the manufacture of cosmetics, toiletries, and pharmaceuticals; Chemical preservatives, namely, chemical preservatives for use in manufacture of soap and vegetable oil; Botanical extracts for use in making cosmetics; Chemical preservatives for use in the production of a wide variety of chemicals; Chemical oenological bactericide as raw materials for use in the manufacture of industrial products, consumer and household products; Chemical additives for use in the manufacture of cosmetics; Emulsifiers for use in the manufacture of industrial products, consumer and household products; Acrylate copolymer beads for use in manufacturing; Polymers and polymeric additives for use in the manufacture of pharmaceutical preparations, medical devices, plastics, cosmetics, personal care products; Carbomer polymer beads for use in manufacturing; Industrial Chemical Additives for use in the manufacture of foods, pharmaceuticals and cosmetics; electrolyte for lithium-ion battery; lithium salt; Cathode and anode material in the nature of industrial chemicals for Lithium-ion battery, namely, Lithium nickel oxide, lithium iron phosphate, cobaltate lithium, lithium titanate, natural graphite and graphite in raw or semi-finished form for use in manufacturing.

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