Synergistic effect of adsorption and electrocatalysis of CoO/NiO heterostructure nanosheet assembled nanocages for high-performance lithium–sulfur batteries

Abstract

The dissolution and sluggish redox kinetics of lithium polysulfides (LiPSs) hinder the practical electrochemical performance of lithium-sulfur (Li-S) batteries. The modification of separators with functional materials plays an important role...

Improvement of Redox Kinetics of Dendrite-Free Lithium–Sulfur Battery by Bidirectional Catalysis of Cationic Dual-Active Sites

“…The high areal capacity of 2.7 and 3.8 mAh cm –2 can still be obtained after 100 cycles at a current density of 0.5 mA cm –2 (Figure b). Additionally, recently published studies (Figure c) on modified separators were compared in terms of different aspects. ,− These results further proved that the 3DCS-FMO@C separator can still effectively improve sulfur electrochemistry and inhibit the shuttling of LIPSs in the case of high sulfur loading and poor electrolyte.…”

Hierarchical Co/MoNi heterostructure grown on monocrystalline CoNiMoOx nanorods with robust bifunctionality for hydrazine oxidation-assisted energy-saving hydrogen evolution

“…The peaks at binding energies of 780.9 and 784.0 eV are attributed to the Co 3+ and Co 2+ states, while the peak at a binding energy of 777.8 eV belongs to the metallic Co 0 state. 46,47 Similarly, the Ni 2p spectrum (Fig. 2c) in CoNiMo/CoNiMoO x is also fitted into two pairs of spin–orbit doublets: one peak at binding energy of 852.4 eV belongs to the metallic Ni 0 state and the other peaks at binding energies of 855.7 and 858.2 eV are respectively attributed to the Ni 2+ and Ni 3+ states.…”

Amorphous/crystalline heterostructure design enables highly efficient adsorption–diffusion–conversion of polysulfides for lithium–sulfur batteries

“…It is worth mentioning that the performance of our separator modifier is also superior to that of many other separator modifiers, as depicted in Fig. 5h and listed in Table S2 † 8,14,15,48–50,53–64.…”

“…A c-Bi 2 Se 3 /a-BiO x heterostructure modied polypropylene (PP) separator (denoted as c-Bi 2 Se 3 /a-BiO x -PP) was prepared through a vacuum ltration method. 27,48,49 Owing to the high electrical conductivity and large surface area, reduced graphene oxide (rGO) was used as the conductive agent to decrease the interface resistance between the separator and cathode. 14,27 The morphology difference between pristine PP and c-Bi 2 Se 3 /a-BiO x -PP is observed from the top-view SEM images (Fig.…”

“…5h and listed in Table S2. † 8,14,15,[48][49][50][53][54][55][56][57][58][59][60][61][62][63][64] To fulll the demand for practical applications of Li-S batteries, the electrochemical performance at high sulfur loading was investigated. Fig.…”