Topotactically synthesized ultralong LiV3O8 nanowire cathode materials for high-rate and long-life rechargeable lithium batteries

Abstract

High-power applications at fast charge and discharge rates are still significant challenges in the development of rechargeable lithium (Li) batteries. Here, we demonstrate that ultralong LiV 3 O 8 nanowire cathode materials synthesized by topotactic Li intercalation are capable of excellent high-rate performance with minimal capacity loss. A specific discharge capacity of 176 mAh g À1 can be obtained at the current density of 1500 mA g À1 , and the capacity is able to stabilize at 160 mAh g À1 after 400 cycles, corresponding to 0.025% capacity fading per cycle. For current density up to 2000 mA g À1 , the initial and the six-hundredth cycle capacities can reach 137 and 120 mAh g À1 , respectively, corresponding to a capacity fading of only 0.022% per cycle. The ability to provide this level of performance is attributed to a low-charge-transfer resistance, good structural stability, large surface area and suitable degree of crystallinity, and it indicates that LiV 3 O 8 nanowires are promising cathode materials for use in high-rate and long-life rechargeable Li batteries.

The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

“…The peak at 3.59 V is related to the initial lithium ion inserted into the octahedral site of the LVO host structure [34]. The peaks at 2.41 and 2.51 V correspond to Li-ion insertion in the empty tetrahedral site with a single-phase reaction, and the peak around 2.34 V may relate to the two-phase transformation of Li 3 [35][36][37][38][39]. While the peak at 3.46 V may stem from the insertion reaction of LiV 2 O 5 [30].…”

Tuning ultrafine manganese oxide nanowire synthesis seeded by Si particles and its superior Li storage behaviors

“…The MnCO 3 precursor was prepared by a hydrothermal method. 19 First, 0.7 g of KMnO 4 powder was dissolved into a 40 ml glycol solution (glycol:H 2 O = 1:3(v/v)) to form a purple solution. Different amounts of Si nanoparticles were mixed with the glycol solution and annealed inside a 50 ml Teflon-lined autoclave at 180°C for 24 h. The molar ratio of Si and KMnO 4 was adjusted from 0:1 to 1:2.…”

“…[1][2][3][4] MnO is among the well-known technologically important materials used in diverse application areas, including in electronics, 5 sensors, 6 magnetic storage media, 7 optical 8 and catalysis, 9 especially lithium-ion batteries. [10][11][12][13][14][15][16][17][18] Several techniques for the synthesis of MnO 1D structures have been made available.…”

A highly reversible, low-strain Mg-ion insertion anode material for rechargeable Mg-ion batteries

“…Compared to lithium battery systems, [1][2][3][4][5][6] rechargeable magnesium (Mg) batteries are considered to be a prospective candidate for reversible energy storage because of the great abundance of Mg resources, better chemical stability of metallic Mg in humid and oxygen-containing environments and higher volumetric capacity. [7][8][9] In particular, the increasing attention to rechargeable Mg batteries is due to the pioneering work of Aurbach's group.…”