The invention provides a composite negative electrode active material which comprises a first active material and a second active material, the first active substance is a graphite material; the second active substance is a high-capacity material; the performance factor P of the active substance is defined, P = SSA * (Dv10-Dv0)/Dn50, Dv10 is 0.5-10 [mu] m, Dv0 is 0.1-10 [mu] m, Dn50 is 0.1-17 [mu] m, and SSA is 0.5-15 m < 2 >/g; the performance factor P of the first active substance is 0.25-1.1; and the performance factor P of the second active substance is 0.5-11. The invention also provides a composite negative electrode material, a composite negative electrode plate, a battery, a vehicle and application thereof. When the composite negative electrode active material is applied to a composite negative electrode plate, the cycle performance of the material can be considered while the capacity and the dynamic performance of the material are improved, so that when the composite negative electrode active material is applied to a battery, the battery which meets the requirements of high capacity and high magnification and has the performances of long cycle, high-temperature storage and the like can be obtained.
提供一种复合负极活性材料,包括第一活性物质和第二活性物质;第一活性物质为石墨材料;第二活性物质为高容量材料;定义活性物质的性能因子P,P=SSA*(Dv10‑Dv0)/Dn50,Dv10在0.5‑10μm,Dv0在0.1‑10μm,Dn50在0.1‑17μm,SSA在0.5‑15m2/g;第一活性物质的性能因子P为0.25‑1.1;第二活性物质的性能因子P为0.5‑11。还提供其复合负极材料、复合负极极片、电池、车辆及其应用。该复合负极活性材料用于复合负极极片时,能够在提升材料的容量和动力学性能的同时,兼顾材料的循环性能,从而将其用于电池中时,能获得满足高容量和高倍率,兼顾长循环和高温存储等性能的电池。
Composite negative active material, composite negative pole piece, battery and vehicle
复合负极活性材料、复合负极极片、电池和车辆
2025-05-09
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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