| abstract |
The present invention relates to technical field of lithium ion, especially a kind of high performance Fe 3 O 4 Phosphorus alkene-carbon composite nano cluster low-temperature lithium ion negative electrode material and its preparation method and application, including porous phosphorus alkene-carbon composite interstitial substance and Fe 3 O 4 Nano particle, the Fe 3 O 4 Nano particle is uniformly embedded in inside porous phosphorus alkene-carbon nanocluster material.Fe 3 O 4 Phosphorus alkene-carbon nanocluster size is 20~800nm, Fe 3 O 4 Nanoparticle size is 1~50nm.Lithium ion battery negative material produced by the present invention, which has, by porous phosphorus alkene-carbon composite interstitial substance and is uniformly embedded in Fe therein 3 O 4 The porous Fe that nano particle is constituted 3 O 4 Phosphorus alkene-carbon nano-cluster composite material.Under the conditions of -20 DEG C, 1A g ‑1 Discharge capacity is up to 997.6mAh g respectively after recycling 200 times under current density ‑1 .Under the conditions of -40 DEG C, 4A g ‑1 Discharge capacity is up to 486.5mAh g respectively after recycling 1000 times under current density ‑1 .The equipment that preparation method uses is simple, and process is easy to control, obtained negative electrode material low temperature high magnification capacity with higher and cyclical stability. |