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Patent
Shanghai Aowei Technology Development Co. | Date: 2010-07-30

The present invention relates to a preparation method of a long cycle life negative electrode as well as the organic hybrid capacitor battery using this negative electrode. The preparation steps of the negative electrode include: blending all materials including carbon material with a fast lithium intercalation capability, and a binder, and adding in solvent; pressing the blended material to get an electrode plate of a certain thickness; stirring the conductive agent to a paste, and attaching it to a cathode current collector; attaching the electrode plate to the conductive agent coated negative current collector; Drying, grinding, cutting and vacuum drying to form a negative electrode. In the present invention, the process of pressing the electrode plate into shape first and then attaching to the negative current collector is used, which enables the negative electrode to have a high compressed density and cycle life. The organic hybrid super capacitor battery in the present invention has high energy density (up to 45-80 Wh/Kg), high power density (>4500 W/Kg), and can be widely used in electric vehicles, power tools, solar energy storage, wind energy storage, portable electric appliances and other fields.


Zhang X.,Shanghai JiaoTong University | Wang W.,Shanghai JiaoTong University | Hua L.,Shanghai Aowei Technology Development Co. | Heng J.,Shanghai Aowei Technology Development Co.
Huagong Xuebao/CIESC Journal | Year: 2016

Temperature characteristic is one of the important properties for an electric double layer capacitor (EDLC), and the reversible and irreversible heat are combined with the charging and discharging for an EDLC. In this study, the numerical simulation of heat transfer, conducted with the finite element technology, and temperature measurement inside and outside EDLC were performed during galvanostatic cycling with different current densities. The heat transfer characteristics and temperature distribution were analyzed by the comparison between the simulated and measured temperatures. And then, the variation and the influencing factors of reversible heat and temperature oscillation during galvanostatic cycling were discussed. Meanwhile, the EDLCs need to be cooled during charging and discharging cycles with great current according to the measured results. © All Right Reserved. Source


Patent
Shanghai Aowei Technology Development Co. | Date: 2010-12-31

The present invention relates to an organic capacitor battery with high specific energy and high specific power. It is composed of an anode, a cathode, a separator in-between the cathode and anode, and an organic electrolyte. The characteristics of the capacitor battery are that the anode is a mixture of porous carbon materials with a lithium-ion intercalation compound, the cathode is hard carbon, and the electrolyte is an organic solvent electrolyte containing lithium ions. The super capacitor battery prepared according to this invention has high energy density (up to 20-90 W/Kg) and high power density (>4500 W/Kg, and it can be widely used in electric vehicles, power tools, solar energy storage, wind energy storage, portable appliances and other fields.


Zhang X.,Shanghai JiaoTong University | Wang W.,Shanghai JiaoTong University | Lu J.,Shanghai JiaoTong University | Hua L.,Shanghai Aowei Technology Development Co. | Heng J.,Shanghai Aowei Technology Development Co.
Thermochimica Acta | Year: 2016

Heat generated in electric double-layer capacitors (EDLCs) during charging or discharging includes irreversible and reversible heat, the former is caused by the Joule effect, the latter is attributed to the ion adsorption/desorption at the electrode/electrolyte interface. In this study, the reversible heat of EDLCs is discussed with the surface Gibbs free energy at the electric double-layer, with the model the calculated temperature behaviors for the EDLCs with liquid electrolyte are compared with some experimental data. Temperature profiles and oscillation amplitudes in galvanostatic cycling which are affected by reversible and irreversible heats are discussed in detail. The relations of reversible heat with current as well as electrolyte temperature and concentration are analyzed as well. © 2016 Elsevier B.V. All rights reserved. Source


Hua L.,Shanghai Aowei Technology Development Co. | Yang E.,Shanghai Aowei Technology Development Co. | Liang Q.,Shanghai Aowei Technology Development Co. | Gong Z.,Shanghai Aowei Technology Development Co. | And 3 more authors.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

Due to its prevailing advantages of high specific power, fast charge speed, long cycle life and high reliability, the super capacitor has become one of most important parts in the power system of the new energy automotives industry. Based on the virtues mentioned above, the super capacitor technology has realized the big scaled commercial application in pure electric city buses for a long-term with the feature of high power, fast charge speed, long service life, high reliability and small voltage and temperature discrepancies among cells. Its future practical application in pure electric traction vehicle with heavy-duty and hybrid automotives are also highlighted and hopeful. Source

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