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Graphical abstract In situ-growth of 1T/2H-MoS 2 nanosheets on the CFC, ultra-small SnS 2 nanoparticles are anchored on the surface of MoS 2 nanosheets unifromly. When the SnS 2 /MoS 2 /CFC composites applied as a binder-free flexible anode, it exhibits excellent performances. A highly flexible full cell was fabricated, demonstrating remarkable flexibility and cycling stability. Highlights • In-situ growth SnS 2 /MoS 2 on CFC by a hydrothermal method and water bath process. • SnS 2 /MoS 2 shows a capacity of 1294 mA h g−1 at 0.1 A g−1 after 120 cycles. • The distribution of SnS 2 on 1T/2H-MoS 2 can enhance electrochemical properties. • A full cell is fabricated, showing high flexibility and electrochemical properties. Abstract Flexible lithium ion batteries are important for wearable electronic devices. Herein, 1T/2H phase MoS 2 nanosheets are grown on carbon fiber cloth, and the ultra-small SnS 2 nanoparticles are anchored in the surface of MoS 2 nanosheets uniformly. We fabricate the hierarchical nanostructures via a hydrothermal method then water bath process. During in-situ growth of 1T/2H phase MoS 2 , urea is used as the surfactant and NH4+ (produced by urea and ammonium molybdate tetrahydrate) is acted as insertion guest ions to stabilize 1T phase MoS 2. The synergistic effects between MoS 2 nanosheets and SnS 2 nanoparticles can improve structural stability of the electrode and significant enhance the transport of Li ions and electrons, thereby ameliorate the electrochemical properties. When applied as a binder-free, flexible Li-ion battery anode, it exhibits admirable cycling stability and excellent rate performance. Due to the presence of 1T phase MoS 2 and uniform distribution of ultra-small SnS 2 nanoparticles on MoS 2 nanosheets, the SnS 2 /MoS 2 /carbon fiber cloth composites maintain 1294 mA h g−1 when cycling at 100 mA g−1 after 120 cycles. A highly flexible battery based on SnS 2 /MoS 2 /carbon fiber cloth and LiCoO 2 is fabricated, demonstrating excellent mechanical flexibility and cycling stability. [ABSTRACT FROM AUTHOR]

In this work, hierarchical flower-like Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 (LNCM) with exposed {010} planes assembled and double-sphere Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 without {010} planes as a comparison were successfully synthesized via a simple solvothermal method. The diffusion of Li+ could be enhanced in the flower-like LNCM with exposed {010} active planes, and the cathode exhibits a superior electrochemical performance especially in long-term cycling stability even at high current densities. The initial discharge capacity of this sample is 274 mA h g−1 at 0.1C (25 mA g−1), with corresponding initial coulombic efficiencies of 77%. Especially, the capacity retention reaches up to 98% at 1250 mA g−1 current density after 100 cycles. By comparing with other LNCM materials reported recently, our optimal cathode has a pretty outstanding electrochemical performance, which is promising for the next generation lithium ion batteries. [ABSTRACT FROM AUTHOR]

Cr-doped γ-Fe 2 O 3 /reduced graphene oxide (rGO) nanocomposites are successfully synthesized through a rapid and environmentally friendly microwave method in just 10 min. Under the microwave heating, graphene oxide (GO) is reduced to rGO with ferrous ion (Fe 2+ ) served as the reductant, and Cr-doped γ-Fe 2 O 3 nanoparticles are synthesized in the meantime. It is found that Cr doping can not only affect the phase of Fe 2 O 3 , but also has an effect on the morphology, the electrical conductivity and the electrochemical properties. As anode material for lithium ion batteries, the 4.0 at% Cr-doped γ-Fe 2 O 3 /rGO nanocomposites exhibit the highest reversible capacity of 1060 mAh g −1 after 100 cycles (66.9% of the initial capacity) at a current density of 100 mA g −1 . Furthermore, when assembled as a full cell against commercial cathode including LiCoO 2 and LiNi 1/3 Mn 1/3 Co 1/3 O 2 , the battery shows promising cycling performance. The superior electrochemical performance could be attributed to the uniform nanostructure and the synergistic effect between Fe 2 O 3 and rGO as well as the doping of chromium, which can reduce the size of Fe 2 O 3 particles and improve the electrical conductivity. [ABSTRACT FROM AUTHOR]