High power and high safety oxide-based negative electrode materials for Li-ion battery -- ScienceDaily

High power and high safety oxide-based negative electrode materials for Li-ion battery -- ScienceDaily

TNO shows the reversible capacity of 250 mAh g-1 at low current rate and good cycle stability. However, TNO is insulating materials and its electronic conductivity is quite low, which leads to the poor electrochemical performance at high current rate.

Here, Toshiki Takashima, Ryoji Inada, Yoji Sakurai and colleagues at Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology show the improvement of electrochemical performance of TNO at high current rate by vacuum annealing.

The photos and X-ray diffraction patterns of TNO annealed in air and vacuum are compared in Fig. 1. Although the crystal structure is not changed by the difference annealing atmosphere, the color of TNO is changed from white to dark blue by vacuum annealing, indicating that the presence of the mixed Ti4+/Ti3+ ions.

Thermogravimetric analysis clearly shows small amount of oxygen vacancy is introduced by vacuum annealing, which causes partial reduction from Ti4+ to Ti3+ in TNO. By addressing this fact, vacuum-annealed TNO (V-TNO) shows much higher electronic conductivity (10-6?10-5 S cm-1) than air-annealed one (A-TNO) at room temperature.

Fig. 2 shows the comparison of charge and discharge curves of both A-TNO and V-TNO electrodes at various fixed current densities per unit electrode area of 0.5, 2, 4 and 7 mA cm-2. The charge and discharge capacities for both electrodes are decreased monotonically with increasing current densities, but V-TNO shows larger capacity than A-TNO under the current density above 2 mA cm-2. This tendency becomes more remarkable as the current density is increased.

The improved electrochemical performance of V-TNO electrode at high current rate is mainly attributed to enhancement of intrinsic electronic conductivity. V-TNO can potentially be used as novel negative electrode material of Li-ion battery with high power and high safety for large scale applications such as hybrid electric vehicles and energy storage system.

Welcome to SUV System Ltd!

SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.

We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.

SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com

Electronic Components distributor:http://www.suvsystem.com

Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html

IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html

LED Distributor:http://www.suvsystem.com/l/LED-1.html

Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html

Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html

Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html

Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html

SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc

we are focus on the following fields,and hope we can help you.

LED part TDK IC AVX Resistors Current Sensors Resistors IDT IC Schottky Diodes YAGEO Resistors PANASONIC Connectors Resistors Industrial IC ELPIDA IC MOTOROLA IC INFLNEON Diodes LED Other Parts ST Diodes ON Diodes Electronic News AGILENT LED NXP Diodes ST Transistors VISHAY IC Transistors Freescale AD IC NXP Transistors SANYO IC Civil IC ALTERA IC ROHM Resistors Chip Inductors INTERSIL IC Kingbrigt LED Fast Recovery Diodes BB IC NEC Diodes DIODES Transistors Voltage Regulators Transistors TOSHIBA Transistors Thin Film Resistors
http://www.suvsystem.com/a/43520.aspx