Improving the electrochemical behavior of lithium-sulfur batteries through silica-coated nickel-foam cathode collector

Review on High‐Loading and High‐Energy Lithium–Sulfur Batteries

“…Ni foams also enabled good electrochemical performance of high‐sulfur‐loading electrodes based on various composite materials such as PPy/sulfur (4 mg cm −2 ), pyrolyzed or dehydrogenated PAN/sulfur or sulfurized PAN (4–15 mg cm −2 ), Li 2 S/various nanocarbon (5 mg cm −2 ), N, S‐codoped graphene/sulfur (6.3 mg cm −2 ), and so on. Ni foams were also modified by coating SiO 2 layers to enhance the adsorptivity to polysulfides . To overcome the drawback of Ni in the heavy density (8.91 g cm −3 ), our group adopted 3D Al foams, engineered with through holes (size of ≈100 µm and distributive density of ≈1000 cm −2 ), as current collectors to provide enlarged contact surface to CNT/sulfur composites ( Figure 11 a) .…”

Decoration of indium tin oxide nanoparticles with different crystal structures and morphologies on polypropylene separator for Li‐S battery

“…[3][4][5] However, some existing problems make them inappropriate for further commercial application, including poor conductivity of sulfur and its end product, huge volume change rate, and most notably the so-called polysulfides shuttle effect which caused fast capacity decay, low specific capacity, and poor cycling stability of the battery. [6][7][8] In recent years, a variety of solutions are proposed to solve the above difficulties in which most of the works are concentrating on the improvement of cathode materials, such as anchoring sulfur and polysulfides in the cathode with various carbon hosts, [9][10][11] conductive polymers [12][13][14] and metal oxides. [15][16][17] Although these materials do make some improvements for the aforementioned problems, it is still difficult to completely prevent the shuttling of polysulfides from cathode to the anode electrode.…”

“…Lithium‐sulfur battery is emerged as a novel kind of prospective rechargeable energy conversion system for their significant advantages, such as the high‐energy density (2600 Wh kg −1 ), abundant raw materials, and environment‐friendly 3‐5 . However, some existing problems make them inappropriate for further commercial application, including poor conductivity of sulfur and its end product, huge volume change rate, and most notably the so‐called polysulfides shuttle effect which caused fast capacity decay, low specific capacity, and poor cycling stability of the battery 6‐8 …”

Nb2O5-Decorated Nitrogen-Doped Carbon Nanotube Microspheres for Highly Efficient Sulfur Confinement in Lithium–Sulfur Batteries

“…10 Ding et al reported that sulfur−carbon yolk−shell particles are based on 3D interconnected nanostructure as cathode material and exhibited a high initial capacity of 560 mAh g −1 (per gram electrode) with good cycling performance. 13 Furthermore, metal oxides, such as MnO 2 , 17,18 TiO 2 , 19,20,37 Al 2 O 3 , 21 MgO, 22,23 and SiO 2 , 24,25 are widely investigated due to their intense chemical binding energies with lithium polysulfides, which can avert the irreversible dissolution of polysulfides within the electrolyte during the charge and discharge processes. 28 An effective nanometric MnO 2 shell on sulfur particles was fabricated by an in situ redox reaction between sulfur and KMnO 4 under ambient conditions.…”