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Recently, Huang Hao Laboratory of Dalian University of Technology proposed a carbon-constrained iron nitride nanoshells shell structure for lithium-ion secondary batteries in the cycle process, the serious volume expansion of the active material, resulting in electrode powdering failure bottleneck. After using the new technology, in 500 cycles of experiments, the battery can still maintain the working capacity, no significant attenuation was found. Relevant results published in the "nano-energy" journal.
In this study, carbon-constrained iron nitride nanomaterials were prepared as the negative electrode of lithium-ion batteries by plasma physical and chemical nitridation process, which achieved high-density energy storage and electrode material stability of lithium-ion batteries. At the same time, the electrolyte can freely enter the carbon layer through the defect position and electrochemically react with the active material iron nitride.
The flexible carbon shell can not only reduce the volumetric expansion and contraction of the active material during the storage and storage of lithium, resulting in the electrode powdering failure problem, meanwhile, the excellent intrinsic conductivity of the carbon layer provides an effective path for the rapid transfer of interface charges to achieve the carbon constraint Long - cycle High Density Charge - Discharge Performance of Iron Nitride Nanomaterials in Lithium Ion Batteries. The research results provide theoretical basis and technical support for improving the engineering application of nano-energy materials and devices.
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