Design of SnO₂/C hybrid triple-layer nanospheres as Li-ion battery anodes with high stability and rate capability

Abstract

The problems of the large volume change during Li insertion and extraction and poor high-power performance of SnO 2 -based electrodes should be solved for their practical application. Herein, a novel SnO 2 /C hybrid triple-type nanosphere, in which a layer of amorphous carbon was sandwiched between the layers of the SnO 2 and carbon composite, has been designed and fabricated by a top-down approach. Due to its special structure, this kind of SnO 2 -based electrode exhibited a considerable capacitive performance, offering a greatly enhanced cycling stability and rate capability. Its capacity remained as high as 653 mA h g À1 after the 350 th cycle. The irreversible capacity decay was unprecedentedly extended to the 80 th cycle. What is more, this electrode even exhibited a capacity of 260 mA h g À1 at 20 C, with a fading of less than 16% after 600 cycles and less than 22% even after 1000 cycles.

A textile-based SnO2 ultra-flexible electrode for lithium-ion batteries

“…3d). [89] The symmetric XPS peaks centred at 487.3 and 495.7 eV can be ascribed to Sn-O 3d 5/2 and Sn-O 3d 3/2 bonding of SnO 2 respectively (Fig. 3e).…”

“…3e). [56,89] Furthermore, the O 1s spectrum in Fig. 3f As the electrochemical performance of electrodes depends on the specific surface area of the CF@SnO 2 -NS@AC, it was evaluated by N 2 adsorption/desorption isotherms (the resulted isotherm measured at 70 K is illustrated in Fig.…”

TiO2 Nanotube Arrays Grafted with MnO2 Nanosheets as High-Performance Anode for Lithium Ion Battery

“…Various transition metal oxides have been widely studied as electrode materials for rechargeable lithium-ion batteries due to their high theoretical capacity, safety, environmental benignity, and low cost [6][7][8][9][10][11][12][13]. Among these metal oxides (LIBs), manganese dioxide (MnO 2 ) has been recognized as one of the most intensively investigated metal oxides owing to its high theoretical capacity of 1230 mA h g À1 , relatively low electrochemical motivation force, and natural abundance [14][15][16][17][18][19].…”

Effects of morphology, size and crystallinity on the electrochromic properties of nanostructured WO3 films

“…Obviously, the Li-ion storage capacities of WNRs-1, WO 3 nanoflake arrays and WNRs-2 are much larger than that of the porous WO 3 nanofibers, suggesting that the nanostructures with larger size have higher Li-ion storage capacity. In addition, the cyclic reversibility values could reach as high as 99% (WO 3 nanofibers), 93% (WNRs-1), 97% (WO 3 nanoflake arrays) and 95% (WNRs-2), as calculated from the intercalation/deintercalation of Liion charge/discharge densities, which may be ascribed to the higher surface area of the porous structures (WO 3 nanofibers and WO 3 nanoflake arrays) and top-down structures 19,20 (WNRs-1 and WNRs-2). These reversibility values are largely increased compared with the reported ones for WO 3 nanoporous networks 10 (85-93%) and nanocuboids 21 (72%).…”