| 摘要 |
A powder comprises pierced particles 200 for use as an active component of a metal ion battery, the particles each comprising a particle body 201 with at least one passage 202 extending therethrough, wherein the particles have an average aspect ratio of at least 3:1 and an average thickness of no more than 3 μm and the passages have an average width of at least 30 nm. The particles preferably comprise silicon or tin or both. A composition comprises the powder and at least one further component that may be active carbon or may be conductive, non-active carbon. Also disclosed is a slurry comprising the powder or composition, an electrode comprising the composition, a metal ion battery with an anode comprising the powder or composition and a method of forming a metal ion battery. A method of forming a powder includes piercing particles of a starting material powder, preferably pierced by etching. A further method includes forming a film comprising passages extending therethrough and breaking the film. |
