Negative electrode active material, negative electrode, and battery

The invention relates to a negative electrode active material, a negative electrode and a battery. The negative electrode active material includes active particles and a modified layer. The active particles contain a silicon element, a carbon element, or a combination thereof. The modification layer covers the surface of the active particles. The modification layer includes a residue of a coupling agent and a residue of a metal compound. A residue of the coupling agent is bonded between the active particles and a residue of the metal compound. The residue of the metal compound contains a metal atom. 本发明涉及负极活性材料、负极以及电池。负极活性材料包含活性粒子以及修饰层。活性粒子含有硅元素、碳元素、或其组合。修饰层披覆于活性粒子的表面。修饰层包含偶合剂的残基与金属化合物的残基。偶合剂的残基键合在活性粒子与金属化合物的残基之间。金属化合物的残基含有金属原子。