报告题目：Development of advanced rechargeable batteries for renewable energy storage  and conversion  

报告时间：2016年10月15日下午14：00

报告地点：子良楼B-4会议室

报告人：悉尼科技大学 汪国秀 教授

报告人简介：

汪国秀教授担任悉尼科技大学（UTS）清洁能源研究中心主任，并且是ARC Professorial Future Fellowship和澳大利亚悉尼科技大学特聘教授。汪教授是材料化学、电化学、能源存储与转换和电池技术方面的专家，研究方向包括锂离子电池、锂空气电池、钠离子电池、锂硫电池、超级电容器、储氢材料、燃料电池、石墨烯及其化学功能化衍生物等。汪教授已发表SCI期刊论文360余篇，被引用15000余次，H因子61。

报告内容简述：

In this talk, I will report the development of advanced electrode materials for various high performance rechargeable batteries.

3D hyperbranched hollow carbon nanorod architectures were synthesised for high performance Li-S batteries. The nanorod composites delivered a high specific capacity of 1378 mAh/g with excellent cycle life.  Multichambered micro/mesoporous nanocubes were also prepared as new polysulfide reservoirs for Li-S batteries with long cycle life.

Lithium-air battery is the most promising system as the power source for electric vehicles. The theoretical specific energy of the Li-O2 battery is 3,505 Wh kg?1, which is almost ten times higher than that of Li-ion batteries (387 Wh kg-1).  Porous graphene with different pore size architectures were synthesized as cathode catalysts for lithium-air batteries, which exhibited significantly higher discharge capacities than that of non-porous graphene. Moreover, the Ru nanocrystal decorated porous graphene exhibited an excellent catalytic activity with a high reversible capacity, low charge/discharge over-potential, and long cycle life.

Sodium-ion batteries are being considered as a promising system for stationary energy storage and conversion, owing to natural abundance of sodium. Several novel electrode materials were synthesized as either cathode materials or anode materials for lithium-ion batteries and sodium ion batteries.

Potassium-ion batteries are promising energy storage devices that offer a cost effective solution to store electrical energy on a large scale. An ongoing challenge has been to obtain satisfactory performances in each of the key areas of capacity, stability, cost, and safety. I will report a potassium iron (II) hexacyanoferrate nanocube cathode material that operates with an aqueous electrolyte to deliver exceptionally high capacities (up to 120 mA h g-1). The cathode material exhibits excellent structural integrity, leading to fast kinetics and highly reversible properties (> 85 % capacity retention over 500 cycles at 21.4 C). All of the battery materials are safe, inexpensive, and provide superior high-rate, long cycle life electrochemical performance.