A hierarchical porous carbon aerogel embedded with small-sized TiO2 nanoparticles for high-performance Li–S batteries

MOF-Derived Hollow Carbon Supported Nickel-Cobalt Alloy Catalysts Driving Fast Polysulfide Conversion for Lithium-Sulfur Batteries

“…The microporous and mesoporous hierarchical porous structure of NiCo@HCS samples can partially block polysulfide migration to the Li anode, promote Li + transport, and improve electrolyte wettability of the separator to reduce polarization of the battery. 35,36 The possible underlying chemical interactions between polysulfides and NiCo@HCS were investigated using the density functional theory (or DFT). Figures S8−S10 show the constructed geometric configurations of Li 2 S 4 and Li 2 S 8 on the (111) crystal plane of the catalyst, where the metal catalytic sites and polysulfides act as electron acceptors and donors, respectively, to construct host−guest interactions.…”

“…Based on the isothermal nitrogen adsorption–desorption behaviors depicted in Figure a, the Brunauer–Emmett–Teller surface area of NiCo@HCS (118.7 m 2 g –1 ) is higher than that of Ni@CS (87.4 m 2 g –1 ) and Co@CS (21.5 m 2 g –1 ), implying that NiCo@HCS may contain more catalytic active centers to adsorb and catalyze polysulfides. The microporous and mesoporous hierarchical porous structure of NiCo@HCS samples can partially block polysulfide migration to the Li anode, promote Li + transport, and improve electrolyte wettability of the separator to reduce polarization of the battery. , The possible underlying chemical interactions between polysulfides and NiCo@HCS were investigated using the density functional theory (or DFT). Figures S8–S10 show the constructed geometric configurations of Li 2 S 4 and Li 2 S 8 on the (111) crystal plane of the catalyst, where the metal catalytic sites and polysulfides act as electron acceptors and donors, respectively, to construct host–guest interactions.…”

Constructing carbon nanotube-optimized hollow Ti3C2 MXene hierarchical conductive networks for robust lithium–sulfur batteries

“…6g and h show the Li 2 S deposition experiments using different catalytic materials. Among them, Ti 3 C 2 @N-CNTs demonstrated the fastest nucleation time, and according to Faraday's law, 48 the deposition amounts of Li 2 S for Ti 3 C 2 @N-CNTs and Ti 3 C 2 HS were calculated to be 273 and 218 mA h g −1 , respectively. Meanwhile, as shown in Fig.…”

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

“…devices are required for the new energy system. Lithium-based energy storage devices, including lithium-ion batteries (LIBs) [4,5], lithium-sulfur batteries (LSBs) [6,7], lithium-air batteries (LABs) [8,9], and lithium-ion supercapacitors (LICs) [10,11], have emerged as the most widely applied electrochemical energy storage systems. Featuring high energy density, excellent cycling stability [12,13], rapid charge/discharge capability [14], and low self-discharge [15,16], lithium-based energy storage devices have found extensive usage in various fields, such as power batteries for electric vehicles [17,18], portable power sources, and green energy storage systems [19,20].…”