Tin phosphide (Sn₄P₃) as the anode material for lithium?ion batteries exhibits high theoretical specific capacity (1.255×10³ mA ? h/g). However, the huge volume expansion and particle agglomeration during the charging and discharging processes lead to serious capacity attenuation. The carbon?coated Sn₄P₃?graphene composite (Sn₄P_3?G@C) was successfully prepared by using graphene as the framework and amorphous carbon material as the coating layer. Sn₄P₃?G@C composite shows a high discharge specific capacity of 0.521×10^-3 mA ? h/g after 70 cycles at 0.05 A/g, and the discharge specific capacity of 0.433×10^-3 mA ? h/g can be maintained after 150 cycles at 0.10 A/g. After 300 cycles at 0.50 A/g, the reversible specific capacity of 0.330×10^-3 mA ? h/g can be exhibited. The co?existence of sheet graphene and carbon coating can not only stabilize the structure of Sn₄P₃ and improve the electrical conductivity of the material, but also effectively alleviate the problem of volume expansion and prevent the agglomeration between particles. Sn₄P₃?G@C shows good lithium storage performance.

Li₂ZnTi₃O₈ anodes coated with N?doped carbon from dopamine hydrochloride were synthesized via a high?temperature solid?state method.Some Ti⁴⁺ ions were reduced to Ti³⁺ ions during synthesis,which enabled the co?modification of coating and doping.The modification method can enhance the ion diffusion coefficients and reduce the charge?transfer resistance.In the rate performance tests at 0.5,1.0,1.5,2.0,2.5,3.0 A/g,the specific capacities of N?doped carbon?coated Li₂ZnTi₃O₈(Li₂ZnTi₃O₈@C?N?2) are over 240.0，220.0，210.0，200.0，190.0，180.0 mA ? h/g,respectively.In addition,the electrochemical performance of this material at a low temperature was also studied.The results show that the Li₂ZnTi₃O₈@C?N?2 sample has much higher discharge specific capacities than those of unmodified Li₂ZnTi₃O₈ anode material at 0 ℃.The initial discharge specific capacity is 262.5 mA ? h/g at 0.2 A/g,and the discharge specific capacity of 241.7 mA ? h/g is still obtained after 300 cycles.Even at 1.0 A/g,the discharge specific capacity is kept at 147.4 mA ? h/g after 300 cycles.