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• SnS-SnS 2 @CNTs composite materials were prepared by a simple one-step solvothermal method. • The SnS-SnS 2 heterostructures have a special internal electric field that promotes charge transfer. • The embedding of carbon nanotubes (CNTs) improves the anode conductivity and alleviates large volume expansion. • SnS-SnS 2 @CNTs exhibits a discharge capacity of 413 mAh·g−1 after 50 cycles. Tin sulfide based materials are attracting attention because of excellent performance as SIBs anode. However, SnS and SnS 2 suffer from severe capacity degradation during the charge/discharge process, as well as high volume expansion, which prevents superior cycling stability of SIBs. In this work, carbon nanotubes (CNTs) modified SnS-SnS 2 materials were prepared by a facile one-step solvothermal approach. The constructed SnS-SnS 2 heterostructures have a special internal electric field that promotes charge transfer. The combination of CNTs also prevents agglomeration of active particles and improves the capacity and cycling durability of SIBs (413 mAh·g−1 after 50 cycles). [ABSTRACT FROM AUTHOR]

• SiO@C composite materials are constructed with phenolic resin pyrolysis method. • SiO@C has an outer rigid carbon coating that effectively alleviates large volume changes. • High durability of the core–shell structure improves the cycling stability of anode. • SiO@C-20 exhibits a discharge capacity of 603 mAh·g−1 after 100 cycles. Silicon monoxide (SiO) is suggested as anode for LIBs with excellent theoretical capacity. Unfortunately, the low electrical conductivity and volume expansion limit its practical application. The preparation of SiO@C composites can effectively solve these problems. SiO@C composite materials are constructed with phenolic resin pyrolysis method. Experimental data indicate that SiO@C-20 with carbon content of 20 wt% possesses a high discharge capacity and superior initial coulombic efficiency (74.81 %) compared to others. The superior performance can be attributed mainly to carbon ratio with adjusting phenolic resin. [ABSTRACT FROM AUTHOR]