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Fujitsu Developed A High Voltage Phosphoric Acid Battery Cathode Material Available 3.8V Voltage
Jun 02, 2017

Fujitsu Research Institute recently announced the successful development of cobalt-based materials and can match the high-pressure phosphate iron battery cathode material. Now lithium-ion battery cathode material using lithium cobalt oxide (LiCoO2), due to the depletion of cobalt material may lead to a substantial increase in the cost of battery materials.

Lithium batteries with iron-based materials and cobalt-based materials compared to the lithium battery in the energy density as the latter, so the iron-based lithium battery voltage is only 2.8 ~ 3.5V, less than the cobalt-based materials 3.75 ~ 4.1V, so Need to develop new iron-based materials.

The Fujitsu found that the location of oxygen atoms around the oxygen atoms are deformed to improve the voltage is an important factor, and developed a new material Li5.33Fe5.33 (P2O7) 4, the production of the button battery also received 3.8V Voltage. This is higher than the previous LiFePO4 as the representative of the ferric phosphate batteries even higher. However, the discharge capacity of the tested coin cell was 105 mAh / g, which was about 25% lower than the theoretical value of 139 mAh / g and 137 mAh / g of LiCoO2, and further development and improvement in the future.

LFP battery