Columbia University develops new bionic flexible lithium battery -Lithium - Ion Battery Equipment
Inspired by the biological spine structure, GuoyuQian et al. of Columbia University developed a flexible lithium-ion battery that maintains the advantage of high volumetric energy density while ensuring good flexibility.
The basic structure of a flexible battery can be divided into a backbone and branches connected to the backbone. These branches are wound around the backbone to form a structure similar to an animal's vertebrae, and the backbone is connected to the external circuit. This structure not only ensures good flexibility of the battery, but also greatly improves the energy density of the flexible battery. When LiCoO2/graphite is used as the active material, the volume specific energy of the battery can reach 242Wh/L.(Lithium - Ion Battery Equipment)
In the electrochemical performance test, the cycle performance of the battery with this structure was not affected whether it was bent (bending radius 20mm, 10,000 times) or twisted (twisted at 90 degrees for 1,000 times), and it was cycled 100 times at a rate of 0.2C. , the capacity retention rate can reach 94.3%, and the Coulomb efficiency can reach 99.9%.
Comments: To tell the truth, although wearable devices such as Bluetooth headsets are relatively common, "smart clothing" with flexible batteries as the core is still far away. A friend told me in the chat that the current smart coats are not cost-controlled, and their reliability is very low, especially when folding and cleaning are very damaging to the battery. Therefore, this friend is trying to transfer the battery to the belt. , the current sample weighs 7 catties and cannot be used for the time being. Therefore, as a consumer, don't expect too much, or buy traditional clothes honestly.
The basic structure of a flexible battery can be divided into a backbone and branches connected to the backbone. These branches are wound around the backbone to form a structure similar to an animal's vertebrae, and the backbone is connected to the external circuit. This structure not only ensures good flexibility of the battery, but also greatly improves the energy density of the flexible battery. When LiCoO2/graphite is used as the active material, the volume specific energy of the battery can reach 242Wh/L.(Lithium - Ion Battery Equipment)
In the electrochemical performance test, the cycle performance of the battery with this structure was not affected whether it was bent (bending radius 20mm, 10,000 times) or twisted (twisted at 90 degrees for 1,000 times), and it was cycled 100 times at a rate of 0.2C. , the capacity retention rate can reach 94.3%, and the Coulomb efficiency can reach 99.9%.
Comments: To tell the truth, although wearable devices such as Bluetooth headsets are relatively common, "smart clothing" with flexible batteries as the core is still far away. A friend told me in the chat that the current smart coats are not cost-controlled, and their reliability is very low, especially when folding and cleaning are very damaging to the battery. Therefore, this friend is trying to transfer the battery to the belt. , the current sample weighs 7 catties and cannot be used for the time being. Therefore, as a consumer, don't expect too much, or buy traditional clothes honestly.
