Positive electrode material of lithium-ion battery and preparation method therefor
摘要
說明書
The intrinsic specific surface area and intrinsic pore size of the above positive electrode material are measured after removing free substances on the surface of the tested material and even some substances inside the tested material via the extreme water washing. Upon the intrinsic specific surface area and intrinsic pore size being within the required ranges, it indicates that, even after prolonged battery cycling, the positive electrode material in accordance with the present disclosure may still have controlled pore configuration. This means that, even after prolonged operation, the positive electrode material in accordance with the present disclosure can still provide a transference path with suitable length for transferring lithium ions, avoiding loss in capacity and rate performance caused by long transference paths. At the same time, a certain ability to resist electrolyte erosion is kept, avoiding a large number of side reactions.
The lithium battery using the positive electrode material may have a discharge capacity of up to 223.8 mAh/g at a rate of 0.1 C and a capacity retention of up to 93.6% after 80 cycles at a rate of 1 C.
The accompanying drawings in the disclosure are only intended to illustrate selected embodiments rather than all possible embodiments and are not intended to limit the scope of the disclosure.
