Abstract: An anode active material for a battery and a preparation method thereof, a battery anode, and a secondary battery. The anode active material for a battery includes anode active substance particles, where the anode active substance particles include silicon oxide compounds and lithium; in the X-ray diffraction using Cu-K? radiation, the anode active substance particles have a first diffraction peak in a range of 2?=18.78°±0.2° and a second diffraction peak in a range of 2?=47.4°±0.3°; and a full width at half maximum of the first diffraction peak is set as A, A is greater than 0.34°, a full width at half maximum of the second diffraction peak is set as B, and B/A?1.3. The anode active material for a battery has superior electrochemical properties, including high energy density and excellent kinetic performance when employed in batteries.

Abstract: An anode active material for batteries including anode active substance particles that include a silicon oxide compound. The anode active substance particles includes lithium and a non-lithium doping metal, where the non-lithium doping metal includes a metal M1 including one or more of titanium, magnesium, zirconium, zinc, aluminum, yttrium and calcium, and the content of the non-lithium doping metal in the anode active material is 0.01-20 wt %, for example 0.05-15 wt %, in another example 0.1-10 wt %, and in still another example 0.1-5 wt %. The anode active material has high water tolerance, and a secondary battery prepared from the anode active material has the advantages of high capacity, high coulombic efficiency and long cycle life.

Abstract: A silicon-based particle with a core-shell structure, a method for preparing the same, an anode material, an electrode and a battery. The silicon-based particle includes: a core comprising an oxygen-containing silicon-based compound matrix and nano-silicon grains, a molar ratio of oxygen to silicon in the core being 0.5-1.5; a silicon carbide layer covering the core; and a carbon layer covering the silicon carbide layer. The silicon-based particle is used in batteries, and has the characteristics of low expansion rate, long cycle life, high capacity and high coulombic efficiency.

Abstract: An anode active material for batteries includes anode active substance particles. The anode active substance particles include silicon oxide compound particles including nano-silicon grains and lithium; and a composite oxide coating layer partially or entirely covering the silicon oxide compound particles and containing a composite oxide of a metal M and phosphorus, where the metal M includes lithium and a non-lithium metal. The anode active material has good water tolerance. A battery prepared from the anode active material has at least the advantages of good cycle performance, high energy density, high coulombic efficiency, good rate performance, and the like.

Abstract: An anode active material for batteries including anode active substance particles that include a silicon oxide compound. The anode active substance particles includes lithium and a non-lithium doping metal, where the non-lithium doping metal includes a metal M1 including one or more of titanium, magnesium, zirconium, zinc, aluminum, yttrium and calcium, and the content of the non-lithium doping metal in the anode active material is 0.01-20 wt %, for example 0.05-15 wt %, in another example 0.1-10 wt %, and in still another example 0.1-5 wt %. The anode active material has high water tolerance, and a secondary battery prepared from the anode active material has the advantages of high capacity, high coulombic efficiency and long cycle life.

Abstract: A silicon oxide particle for an electrode material, including: silicon suboxide particles with a general formula of SiOx; and a carbon layer, where a plurality of silicon suboxide particles are bonded by the carbon layer, and the plurality of silicon suboxide particles are bonded and meanwhile coated by the carbon layer. The silicon oxide particle is dense, with narrow particle size distribution and small specific surface area, and has advantages such as high capacity, high Coulombic efficiency, low swelling rate and high capacity retention.