In the current divergent battery technology development direction, although the prominent point is different, but to ensure and improve the capacity of any technical route must consider the preferred factors, whether lithium or lithium-ion capacitors, or flow battery.

On the lithium-ion battery, it is divided into two types: portable lithium battery and power lithium battery.

The energy density of the portable lithium battery unit with graphite as the negative pole is around 600Wh / L. In August 2011, the Sony lithium battery based on the tin alloy anode is highly tuned. The 18650 lithium battery is mainly aimed at the notebook computer application market. The energy density reaches The 723Wh / L. Due to graphite as the negative lithium battery capacity close to the limit, so the direction of Sony is the development of large-capacity lithium battery a viable option, through silicon and tin alloy anode materials made of lithium battery future goal is to 2020 Energy density of about 800 ~ 1000Wh / L or so.

For pure electric vehicles and plug-in hybrids, the lithium battery capacity to the practical level is a top priority. In increasing the capacity, the hybrid car because of the importance of high magnification and long life characteristics, which will also use lithium-ion capacitors. Lithium-ion batteries for pure electric vehicles and hybrids are also suitable for power storage systems for commercial and residential buildings, and lithium-ion capacitors can also be used to power the grid, according to the different requirements for large fixed storage facilities. City peak peak electricity.

The flow battery has the advantage of being able to increase the capacity and output power by adding low-cost components. Therefore, it is advantageous for hybrid vehicles and large ones with more than 1MW. This technology route is still in progress and is a successful example of industrial application. not much.

In the industrial application, the larger battery market is still in the portable terminal, in this market, a phenomenon is: in addition to the pursuit of high capacity, but also from the fast charging requirements, fast charge technology leader Or Japanese companies, such as NTT, Panasonic lithium battery, NTT released last year, a fast chargeable mobile power, in outdoor activities, only 10 minutes can be full of mobile power, which for the majority of smart phone users The convenience.

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