Business trend
Leading companies
including Toyota, Canon, Canon, Sony, and Panasonic are developing bio battery.
The bio battery creates electric energy from glucose. It is rather inexpensive
because it does not need platinum, and it does not emit carbon dioxide. By
adding electrolyte, it is possible to let the bio battery create electric
energy continuously. The bio battery seems to be the ultimate battery for
vehicles. Sony is taking the lead in this field.
The mechanism of the bio battery is simple. Human changes sugar to energy for his activities.
Likewise, the bio battery changes sugar to electric energy. Adding glucose to the
electrode on which enzyme is fixed allows the enzyme to resolve glucose and
creates electric energy. The critical issues are the know-how on how to coat
enzyme on the electrode and how to modify the surface of the electrode for
higher efficiency. Sony achieved the density of electric output of 10 mW per square centimeter. However, 10 mW is the power that can marginally run a motor.
Unless the density is increased to 5-10 times, it is hardly possible to put the
current bio battery into practical use.
At the present
stage, only glucose is feasible for bio battery. The companies involved in the
development of bio battery are considering using wood and plant stalks resolvable
into cellulose that has the same composition as glucose. Currently, it is not
easy to reduce the production cost of a fuel battery because it needs platinum
for its electrode. As a company that launched a lithium-ion battery for the
first time in the world in the 1990s, Sony exerts lots of energy to make a bio
battery the post lithium-ion battery and invites attention to its development
activities from the world.
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