▎ 摘　　要

NOVELTY - Manufacturing predominantly amorphous silicon-containing particles comprising a silicon moiety (I), where the particles when subjected to X-ray diffraction analysis applying unmonochromated copper (CuKalpha) radiation exhibit one peak at around 28degrees and one peak at around 52degrees, where both peaks have full width at half maximum of at least 5degrees when using Gaussian peak fitting, comprises: forming homogeneous gas mixture of first precursor gas of silicon containing compound and second precursor gas of substitution element M containing compound; injecting the homogeneous gas mixture of the first and second precursor gases into a reactor space where the precursor gases are heated to a temperature of 700-900degrees Celsius so the precursor gases react and form particles; and collecting and cooling the particles to a temperature of up to 350degrees Celsius where the relative amounts of first and second precursor gases are adapted such that the formed particles obtain atomic ratio M : Si is (0.005-0.05). USE - The method is useful for manufacturing predominantly amorphous silicon-containing particles used in composite particle for negative electrode in secondary lithium-ion electrochemical cell (all claimed). ADVANTAGE - The method: provides particles to form stable solid electrolyte interphase layer to limit solid electrolyte interphase-induced loss of lithium to first lithiation/charging of cell; provides particles it has been demonstrated that coating silicon surface with suitable element to avoid direct contact between silicon and electrolyte may provide stable solid electrolyte interphase layer; provides particles that has advantage of gaining relatively high temperature tolerance/crystallization temperature at low substation levels having small/negligible negative effects on capacity and transport properties of active material/particles; and improves production yield as compared to production of (pure) silicon particles without compromising on favourable amorphous structure and is significant economic advantage since silicon hydride gases. DETAILED DESCRIPTION - Manufacturing predominantly amorphous silicon-containing particles comprising a silicon (Si) moiety is of formula: (Si(1-x)Mx) (I), where the particles when subjected to XRD analysis applying unmonochromated copper (CuKalpha) radiation exhibit one peak at around 28degrees and one peak at around 52degrees, where both peaks have a full width at half maximum of at least 5degrees when using Gaussian peak fitting, comprises: forming a homogeneous gas mixture of a first precursor gas of a silicon containing compound and at least one second precursor gas of a substitution element M containing compound; injecting the homogeneous gas mixture of the first and second precursor gases into a reactor space where the precursor gases are heated to a temperature of 700-900degrees Celsius so that the precursor gases react and form particles; and collecting and cooling the particles to a temperature of up to 350degrees Celsius where the relative amounts of the first and the second precursor gases are adapted such that the formed particles obtain an atomic ratio (M : Si) is (0.005-0.05). X = 0.005-0.05; and M1 = at least one substitution element i.e. C and/or N. INDEPENDENT CLAIMS are also included for: (a) predominantly amorphous silicon-containing particles comprising (I); (b) A negative electrode for a secondary lithium-ion electrochemical cell comprising at least one particulate active material, a particulate conductive filler material, binder material, and a current collecting substrate, where the at least one particulate active material is embedded in the binder material to form an anode mass which is deposited as an anode mass layer onto the current collecting substrate, characterized in that the or one of the at least one particulate active material is predominantly amorphous silicon-containing particles; (c) composite particle for use in the negative electrode in a secondary lithium-ion electrochemical cell, comprising predominantly amorphous silicon-containing particles, and a predominantly carbon containing material made by pyrolysis or a carbon rich material; (d) composite particle for use in the negative electrode in a secondary lithium-ion electrochemical cell comprises and an elastic polymer; and (e) composite particle for use in the negative electrode in a secondary lithium-ion electrochemical cell, comprising predominantly amorphous silicon-containing particles and graphene or reduced graphene oxide.