Lithium ion batteries have attracted the attention of many researchers because of their high energy densities. In the past several decades, researchers have made exclusive studies for lithium ion battery materials. Among them, LiMn2O4 is the most important cathode material of the lithium-ion battery because of its low cost,low toxicity,high voltage platform and simple preparation process,Natu...

Spinel Li_(1 x)Mn_2O_4 was prepared using LiOH·H_2O and Mn(CH_3COO)_2·4H_2O as raw materials by sol-gel method.The structure and performance of the spinel were studied.The results show that prepared sample has uniform cubic spinel structure.Electrochemical measurements show that the sample has high specific capacity and good cyclic performance.The modifications of spinel LiMn_2O_4 by anion(...

Direct methanol fuel cell (Direct Methanol Fuel Cell,DMFC) has many important attributes: low market price of methanol, quick refueling, low temperature and pressure operation etc. It has been considered as highly promising power sources. A variety of research groups have been active in the design and optimization of fuel cell configuration. Especially, the fluid mechanic and pressure drop be...

The increasing concerns on energy, environmental and the rapid development of modern science and technology have more demands on batteries. Lithium ion batteries are attractive for use in the field of mobile power source with the favorable properties of high voltage, long cycling life, high research is being conducted to further improve the performance of lithium ion batteries and reduce the ...

Due to the low cost and potential high efficiency, Dye-sensitized Solar Cells (DSCs) attracted a lot of interests of researchers and scientists recently.The low rate of the electron transfering through the multicrystalline network of a nano-crystalline thin film, and the low efficicency of the dye absorbing the low energy photons are two limiting factors that influence the photoelectric conver...

Shortages of energy sources, single energy consumption configuration and badly polluted environment have become important society problems of nowadays. As a kind of clean, high efficient, low-cost of power generation technology, fuel cell using hydrogen will improve the configuration and efficiency of energy sources and the environment.This paper brings forward a design of the small-scale syst...

At present the world\’s primary energy sources are conventional energy sources, such as oil, coal, natural gas and other non-renewable energy sources. Their reserves are limited and they bring tremendous environment deterioration when they are used. The demand that looks for clean and economical substitutions spurs people to exploit and develop renewable energy resources, particularly so...

The Micro-Porous layer (MPL) made up of carbon powder (VXC-72) and hydrophobic agent (PTFE) sandwiched between catalyst layer and gas diffusion layer (GDL) of Proton Exchange Membrane Fuel Cell (PEMFC) can deal with water flood well and improve the performance of PEMFC. In this paper, MPL on wetproof carbon paper were preparation by screen printer technology. The hydrophobicity of MPL was char...

The contactless inductive coupled power transfer system is one of the newest power transfer technology, which transmit energy to load by electromagnetic coupling and without electrical connection or physical contact, what\’s more, it comb-out contact existence of electric spark completely, reduce mechanical wear, and have the characteristics that safeguard operating non-maintaining or lo...

To find the materials with high capacity, high cycleability and easy process is an important issue in developing thin-film lithium-ion battery. The research was initiated by this issue to study the synthesis, microstructures and properties of the thin films based on antimony metal and antimony-tin alloy. The parameters to prepare thin films and the theory relevant to electrochemical properties...