High-energy-density Li–S battery with positive electrode of lithium polysulfides held by carbon nanotube sponge

A low-self-discharge high-loading polysulfide cathode design for lithium–sulfur cells

“…The above-described analyses conrm the high degree of carbonization of the electrospun nanobers and the little nitrogen doping, which means that they were a suitable carbon substrate for the polysulde cathode of lithium-sulfur cells. [44][45][46] The improved performance of this polysulde cathode is contributed by the cathode design with the abovementioned well-carbonized nanober substrate with low nitrogen doping, which holds a large amount of highly active polysuldes and prevents their diffusion. 36 The poly-sulde catholyte stabilized between the carbonized electrospun nanobers enhances the electrochemical reaction, which allows the cell to attain low self-discharge effect aer a long shelf life.…”

Multiple Effects of High Surface Area Hollow Nanospheres Assembled by Nickel Cobaltate Nanosheets on Soluble Lithium Polysulfides

“…The lithium–sulfur (Li–S) battery, as a new electrochemical system, has been widely concerned in the market of secondary energy storage. It not only has a rich source of raw materials, but also has ultrahigh theoretical specific capacity (1675 mAh g −1 ) and energy density (2600 Wh kg −1 ), which is several times more than the conventional Li-ion battery with LiCoO 2 or LiFePO 4 as the cathode [ 1 , 2 ]. Unfortunately, the large-scale commercialization of Li–S batteries still faces several challenges such as the poor conductivity of sulfur, dissolution of lithium polysulfides (LiPSs), and slow reaction kinetics [ 3 , 4 , 5 , 6 ].…”

Multi-cavity carbon nanofiber film decorated with Co-Nx doped CNTs for lithium–sulfur batteries with high-areal-capacity

“…44 For example, Yoshie et al proposed a positive electrode of Li 2 S x held by a sponge of submillimeter-long few-wall CNT that works at low E/S. 45 In this work, a 3D carbon nanober lm decorated with Co-N x doped carbon nanotubes (Co-NCNTs@CNF) has been prepared as the sulfur host and an interlayer. The interior of carbon nanober has a multi-cavity structure, providing enough space for high sulfur loading and relieving the volume expansion of sulfur.…”

“…44 For example, Yoshie et al proposed a positive electrode of Li 2 S x held by a sponge of submillimeter-long few-wall CNT that works at low E/S. 45…”