Hierarchical heterostructure of vacant carbon-box erected MoSe2-x nanosheets as a functional mediator for high-performance lithium-sulfur batteries

Chemical Engineering Journal, Год журнала: 2023, Номер 481, С. 148433 - 148433

Опубликована: Дек. 30, 2023

Язык: Английский

---

Two-birds with one stone: Improving both cathode and anode electrochemical performances via two-dimensional Te-CoTe2/rGO ultrathin nanosheets as sulfur hosts in lithium-sulfur batteries

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 649, С. 86 - 96

Опубликована: Июнь 10, 2023

Язык: Английский

---

2D Nano‐Channeled Molybdenum Compounds for Accelerating Interfacial Polysulfides Catalysis in Li–S Battery

Small, Год журнала: 2023, Номер 20(12)

Опубликована: Ноя. 8, 2023

Abstract The shuttle effect, which causes the loss of active sulfur, passivation lithium anode, and leads to severe capacity attenuation, is currently main bottleneck for lithium‐sulfur batteries. Recent studies have disclosed that molybdenum compounds possess exceptional advantages as a polar substrate immobilize catalyze polysulfide such high conductivity strong sulfiphilicity. However, these materials show incomplete contact with sulfur/polysulfides, uneven redox conversion sulfur results in poor rate performance. Herein, new type 2D nano‐channeled (2D‐MoN x ) via organic‐polyoxometalate superstructure accelerating interfacial catalysis toward high‐performance batteries reported. 2D‐MoN shows well‐interlinked nano‐channels, increase reactive interface surface polysulfides. Therefore, battery equipped displays discharge 912.7 mAh g −1 at 1 C highest retention 523.7 after 300 cycles. Even 2 C, can be maintained 526.6 This innovative nano‐channel design provides nanostructures optimize chemistry eliminate effect

Язык: Английский

---

Promoting Li₂S Nucleation/Dissolution Kinetics via Multiple Active Sites over TiVCrMoC₃T_x Interface

Small, Год журнала: 2024, Номер unknown

Опубликована: Июнь 3, 2024

Abstract Lithium–sulfur batteries (LSBs) are still limited by some issues such as polysulfides shuttle and lithium dendrites. Recently, the concept “high‐entropy” has been considered research hotspot international frontier. Herein, a high entropy MXene (TiVCrMoC 3 T x , HE‐MXene) doped graphene is designed modified coating on commercial separators for LSBs. The HE‐MXene affords multiple metal active sites, fast Li + diffusion rate, efficient adsorption toward polysulfide intermediates. Furthermore, strong lithophilic property favorable uniform deposition. combination of in situ characterizations confirms TiVCrMoC effectively promotes 2 S nucleation/dissolution kinetics, reduces barrier, exhibits deposition behavior. This /G@PP provides high‐capacity retention rate after 1000 cycles at 1 C C, with capacity decay merely 0.021% 0.022% per cycle. Surprisingly, cell operates low potential 48 mV while maintaining 5 mA cm −2 /5 mAh 4000 h. it maintains under sulfur loading 4.8/6.4 mg E/S ratio 8.6/7.5 µg mL −1 . work reveals technical roadmap simultaneously addressing cathode anode challenge, thus achieving commercially viable

Язык: Английский

---

Accelerated Ion‐Electron Transport in Bi‐Heterostructures Constructed Based on Ohmic Contacts for Efficient Bi‐Directional Catalysis of Lithium‐Sulfur Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 9, 2024

Although lithium-sulfur batteries have satisfactory theoretical specific capacity and energy density, they are difficult to further commercialize due the shuttle effect of soluble polysulfides slow sulfur oxidation kinetics. Based on this, in this work, catalyst MXene-VS

Язык: Английский

---