Photorechargeable battery: turning
light energy into chemical energy and
then electric energy
CONTEXT
Notre référence :
06039-01
Status des brevets
French priority patent
application FR1361775
filed on November 28th,
2013 and entitled “
Dispositif
électrochimique
autophotorechargeable”
Lithium batteries became essential components in many devices. However, these
batteries offer low energy density and have to be recharged through the electricity grid
leading to limited quantities of available energy.
Besides, in the last decades, devices transforming solar energy into electricity have been
developed such as dye sensitized solar cell. However, they cannot stored the generated
energy.
Photorechargeable batteries have therefore been proposed. However, performances one
can get with these devices are limited, especially because of the low discharge kinetic
reaction.
None of the documents of the prior art describes a device that first allows the conversion
of light energy into electricity as well as it storage in the form of chemical energy and
secondly shows good storage capacity. Such device will greatly benefit from its
independence from the electricity grid due to its autonomous photorecharge.
TECHNICAL DESCRIPTION
Inventeurs
Frédéric SAUVAGE
Christian ANDRIAMIAD
AMANANA
Christel LABERTYROBERT
Status Commercial
In the present work, the inventors have developed a transparent photorechargeable
electrochemical device that can store energy and be recharged under lights.
This invention is clearly a disruptive innovation in the field of energy storage and
conversion through the combination in one device of 1) the conversion of light energy into
electric energy and 2) its storage in the form of chemical energy.
The device comprises :
A positive electrode (transparent conductive substrate + n-type semi-conductor
such as TiO2)
A negative electrode (alkali metal such as Li)
A liquid non aqueous electrolyte comprising a salt of previous alkali metal such as
LiPF6 in an organic solvent such as ethylene carbonate / dimethyl carbonate.
Exclusive or nonexclusive licenses
DEVELOPMENT STAGE
Laboratoires
The device as described above has been fully assessed on a laboratory scale: discharge,
recharge and photorecharge.
The energy density of the tested device is 30 kWh/kg.
Laboratoire de
Réactivité et Chimie des
Solides (LRCS,
UMR7314), Amiens,
France.
Chimie de la Matière
Condensée de Paris
BENEFITS
Apart of the previously stated benefits.
The photorecharge can be done within few minutes.
The required light can be the sun as well as a regular indoor light.
(CMCP, UMR7574),
Paris, France.
Mots clés :
Battery Photorecharge
Lithium-ion Energy
Storage
Even though it takes longer, the charge can also be done classically through the
grid. This then can answer the question of intermitting light phenomenon.
The energy density is particularly high compared to prior art devices.
INDUSTRIAL APPLICATIONS
Energy production, storage and distribution.
For further information, please contact us (Ref 06039-01)
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