图片来源：http://ceramics.org/ceramictechtoday/wp-content/uploads/2009/09/valvo_batt.png

美国新闻报道Volvo C30已经集成锂电池充电系统，有些参数和性能值得注目：

Recharging the C30’s EnerDel battery pack via a household supply at 230V, 16A would take about eight hours. That’s connection comparable to what would be required for a laundry dryer or mid-sized window air conditioner.

The C30 BEV is limited to a top speed of about 130 km/h (80 mph)—more than sufficient, Volvo says, for a city car application. Acceleration from 0 to 100 km/h (62 mph) will take less than 11 seconds. The car would have a range of up to 150 kilometers (93 miles)—longer than the distance 90% of all Europe’s motorists drive per day and surely covers a wide swath of U.S. motorists as well.

这个应该作为城内用车已经足够了，城际交通用的话充电时间有点长，如果能做成可拆换型的更具有吸引力。

最近一段时间在基础科学上对于锂电池研究也有了一些新的概念，其中碳包裹正负极功能材料屡屡被证明有很好的效果。我粗浅读了几篇文章，从材料制备角度上来看都没有很高的难度，但是是不是都很好地技术转移到实际电池系统中还需要艰辛的努力。

感兴趣的同学可参考

1, Angew. Chem. Int. Ed. 2008, 47, 1-6

2, Angew. Chem. Int. Ed. 2009, 48, 6485-9

以及最近刚出来的一片综述：

3, 'Research on Advanced Materials for Lithium-ion Battery' Adv. Mater. 2009, 21, 1-15

今天又看到PNNL上一个简明新闻引起了大家的广泛兴趣：

A splash of graphene improves battery materials

Thin carbon sheets enhance titanium dioxide-based batteries

Researchers would like to develop lithium-ion batteries using titanium dioxide, an inexpensive material. But titanium dioxide on its own doesn't perform well enough to replace the expensive, rare-earth metals or fire-prone carbon-based materials used in today's lithium-ion batteries. To test whether graphene, a good conductor on its own, can help, PNNL's Gary Yang and colleagues added graphene, sheets made up of single carbon atoms, to titanium dioxide. When they compared how well the new combination of electrode materials charged and discharged electric current, the electrodes containing graphene outperformed the standard titanium dioxide by up to three times. Graphene also performed better as an additive than carbon nanotubes. Yang discussed this work and provided an overview of the field of electrical storage materials. (Contact Mary Beckman, 509-375-3688)

This research was funded by PNNL.

Reference: Jun Liu, Multifunctional materials from self-assembly for energy storage, Tuesday, Sept. 22,2009 Micro Nano Breakthrough Conference, Portland, Ore. NOTE: Gary Yang spoke in place of Jun Liu.

我的感觉是一年后笔记本电脑无源使用8小时应该不成问题，两年后电动汽车应该会比较流行。感谢材料科技的进展。

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