Anchoring ultra-fine TiO₂–SnO₂solid solution particles onto graphene by one-pot ball-milling for long-life lithium-ion batteries

Abstract

A low cost, up-scalable and one-pot wet-mechanochemical approach is designed for fabricating TiO 2 -SnO 2 @graphene nanocomposites where TiO 2 and SnO 2 solid solution nanoparticles are evenly anchored on graphene sheets. As an anode material of lithium ion batteries (LIBs), the as-prepared nanocomposites deliver a superior rate performance of 388 mA h g À1 at 1.5 A g À1 and an outstanding reversible cycling stability (617 mA h g À1 at 0.4 A g À1 after 750 cycles, 92.2% capacity retention), due to the synergistic effects contributed from individual components, i.e., high specific capacity of SnO 2 , excellent conductivity of 3D porous graphene networks, good rate capability and structural stability of TiO 2 structures.

TiNb2O7/Graphene hybrid material as high performance anode for lithium-ion batteries

“…Li/Li + , seems to be an attractive anode, however, its capacity is relatively low (theoretical capacity of 175 mAhg -1 ) [10,11]. Recent reports on another Ti-based transition metal oxide, TiNb 2 O 7 , as an alternative anode material for lithium-ion battery, are very promising [5,[12][13][14][15][16][17][18][19][20].…”

Multichannel hollow structure for improved electrochemical performance of TiO 2 /Carbon composite nanofibers as anodes for lithium ion batteries

“…Unlike electrodes with amorphous structures, anodes with crystalline structure and good morphology are preferred for use in LIBs due to the fact that their structural integrity is preserved during prolonged charge/discharge cycles. TiO 2 based anodes exhibit good rate capability with low volume change (<4%) during repeated charge/discharge cycles due to their good structural stability (layered crystalline structure) mechanism [28]. In addition, TiO 2 anode shows higher Li insertion potential (1.5e1.8 V vs. Li/Liþ) than the commercialized carbon anode materials [29].…”

Graphene‐Based Sulfur Composites for Energy Storage and Conversion in Li‐S Batteries

“…The graphene, a 2D sheet composed of sp 2 -bonded single-layer carbon atoms with the honeycomb lattice structure [29][30][31][32] , has attracted great interests in physics, chemistry, and material science [29] . Owing to its high surface area, flexibility, chemical stability, superior electric and thermal conductivity [30,33] , the graphene has been used as the ideal building blocks for graphene-based electrode materials with desirable functionality [31,32,[34][35][36][37][38][39][40] . The large surface area, high mechanical strength and exceptionally high electrical conductivity of the graphene matrix are beneficial to the Li-S batteries not only in increasing the overall electronic conductivity of the electrode to mitigate the sluggish kinetics [33] , but also to buffer the large volume change between the delithiated S and the lithiated Li 2 S phases [9] .…”