LiFePO4-based electrode using micro-porous current collector for high power lithium ion battery

A three-dimensional carbon-coated LiFePO4 electrode for high-power applications

“…15 mg cm -2 of active material, the latter displayed under 2 s pulse tests a maximum pulse power of 0.12 W cm -2 , but the mass of the NiCr support is 45 mg cm -2 instead of the 10 mg cm -2 of CP. Therefore, the specific power value of the 3D LiFePO 4 /C-CP electrodes is better than that of the LiFePO 4 /C-NiCr electrodes [11].…”

Calendering effect on the electrochemical performances of the thick Li-ion battery electrodes using a three dimensional Ni alloy foam current collector

“…Several years ago, Yao et al developed a Ni-35 wt% Cr alloy foam as a positive current collector for high-rate performance of Li-ion batteries to solve the low tolerance of pure Ni foam [26]. Although Ni foam is suitable for use in a negative electrode of Li-ion battery [19][20][21][22][23] or Ni/MH battery [24,25], it is susceptible to corrosion when used in a positive electrode of Li-ion battery [26][27][28].…”

“…Although Ni foam is suitable for use in a negative electrode of Li-ion battery [19][20][21][22][23] or Ni/MH battery [24,25], it is susceptible to corrosion when used in a positive electrode of Li-ion battery [26][27][28]. Recently, Wang et al developed an Al electroplated Ni foam to suppress the corrosion of Ni foam [28].…”

“…In our study, high tolerance of NiCrAl alloy foam is considered for a positive electrode current collector. Although the NiCr alloy foam exhibited an anodic peak at around 4.7 V from the cyclic voltammetric curve between 2.0-5.0 V [26,29], there is no anodic peak for the NiCrAl alloy foam [30]. Additionally, due to the addition of Al element, it is possible to reduce the amount of Cr element.…”

“…Additionally, the contact area between the active material and current collector is much larger for the threedimensional metal foam [18,26,28]. So it is possible to increase the mass loading of active material in the metal foam current collector for high power and high capacity Li-ion battery due to the better electrochemical performance and the unique structure.…”