Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 3

Year

2017 1

2013 1

2012 1

Keywords

cathode material 2

LiNi_0.5Mn_1.5O₄ 1

coating 1

conductor 1

lithium-ion batteries 1

lithium-ion conductor 1

prospect 1

proton conductor 1

reaction model 1

solid oxide fuel cell 1

using aluminum to save copper 1

open ︾

Search scope:

排序： Display mode:

The prospect of saving copper conductor by using aluminum in China

Huang Chongqi

Strategic Study of CAE 2012, Volume 14, Issue 10, Pages 4-9

Abstract:

Saving copper by using aluminum is the international trend now, but the development is progress step by step and every country has a different processes. There is an obvious difference among China and other countries on the application of aluminum and aluminum alloy in electric cables. There is a wide development space for the aluminum alloy conductors using for overhead line. There is a little development for application of copper clad aluminum conductors and the related standards are being approved as well as written; we expect progressive test in use. Now we also expect to find good technic economic efficient means to separate the copper and aluminum during recycling processing. The market of aluminum clad steel wires is also expanding in recent years, with the maturity of manufacturing technology. The amount of aluminum enameled wire is also rising recently. It is no doubt that there is more fiber and less copper in the communication field continuously. There is a substantial progress of saving copper by using aluminum on airplanes. It is very important for saving energy and protecting environment through recycling copper and aluminum scrap directly. It is imperative under the situation to set up the recoverable networks of scrap wires of copper and aluminum.

Keywords： conductor using aluminum to save copper prospect

HTML PDF Collect

The development review of cathode materials for proton conducting solid oxide fuel cells

Zhao Ling,Xia Changrong

Strategic Study of CAE 2013, Volume 15, Issue 2, Pages 88-97

Abstract:

Energy crisis and environmental pollutions are the problems which the whole world is now facing for the sustainable development. Solid oxide fuel cells (SOFCs), which have been regarded as keystone for the future energy economy, have received considerable attention for their high energy conversion efficiency and low impact to environment as a mean of generating electricity. Proton conducting solid oxide fuel cells (H-SOFCs) have attracted much attention for their unique characters, such as great efficiency in fuel utilization, high electromotive force, high ionic transferring numbers and low activation energies for proton conduction. However, compared with oxygen-ion conducting SOFCs (O-SOFCs), the materials and theories on H-SOFC are just inchoate, especially for cathodes of H-SOFC. In H-SOFC, hydrogen is oxidized at the anode to form protons, which migrate through the electrolyte to the cathode, and undergo a half-cell reaction with oxygen to produce water, which makes the cathode reactions more complex compared with those of O-SOFC. Such distinguished characteristic of cathode reactions calls for intensive consideration on reaction mechanism and might lead to some special demands on the cathode materials. This review is focused on the hisrory of cathode materials for H-SOFC. The electrochemical performances and reaction models of different conduction mechanism cathode materials are summarized, providing some useful means and ways for the development and application of cathode materials for H-SOFC.

Keywords： solid oxide fuel cell proton conductor cathode material reaction model

HTML PDF Collect

Li₄SiO₄-coated LiNi_0.5Mn_1.5O₄ as the high performance cathode materials for lithium-ion batteries

Shifeng YANG, Wenfeng REN, Jian CHEN

Frontiers in Energy 2017, Volume 11, Issue 3, Pages 374-382 doi: 10.1007/s11708-017-0494-2

Abstract: The preparation of Li SiO -coated LiNi Mn O materials by sintering the SiO -coated nickel-manganese oxides with lithium salts using abundant and low-cost sodium silicate as the silicon source was reported. The samples were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. It was found that a uniform and complete SiO coating layer could be obtained at a suitable pH value of 10, which transformed to a good Li SiO coating layer afterwards. When used as the cathode materials for lithium-ion batteries, the Li SiO -coated LiNi Mn O samples deliver a better electrochemical performance in terms of the discharge capacity, rate capability, and cycling stability than that of the pristine material. It can still deliver 111.1 mAh/g at 20 C after 300 cycles, with a retention ratio of 93.1% of the stable capacity, which is far beyond that of the pristine material (101.3 mAh/g, 85.6%).

Keywords： lithium-ion batteries cathode material LiNi_0.5Mn_1.5O₄ lithium-ion conductor