Ultralong Cycling and Interfacial Regulation of Bilayer Heterogeneous Composite Solid-State Electrolytes in Lithium Metal Batteries

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(26), С. 33578 - 33589

Опубликована: Июнь 21, 2024

Under the background of "carbon neutral", lithium-ion batteries (LIB) have been widely used in portable electronic devices and large-scale energy storage systems, but current commercial electrolyte is mainly liquid organic compounds, which serious safety risks. In this paper, a bilayer heterogeneous composite solid-state (PLPE) was constructed with 3D LiX zeolite nanofiber (LiX-NF) layer in-situ interfacial layer, greatly extends life span lithium metal (LMB). LiX-NF not only offers continuous fast path for Li+, also zeolite's Lewis acid-base interaction can immobilize large anions, significantly improves electrochemical performance electrolyte. addition, at electrode-electrolyte interface effectively facilitate uniform deposition Li+ inhibit growth dendrites. As result, Li/Li battery assembled PLPE be stably cycled more than 2500 h 0.1 mA cm-2. Meanwhile, initial discharge capacity LiFePO4/PLPE/Li 162.43 mAh g-1 0.5 C, retention rate 82.74% after 500 cycles. These results emphasize that has distinct properties shows excellent potential application LMB.

Язык: Английский

---

Hydrogen‐Bonding Assembly Meets Anion Coordination Chemistry: Framework Shaping and Polarity Tuning for Xenon/Krypton Separation

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(49)

Опубликована: Окт. 25, 2023

Hybrid hydrogen-bonded (H-bonded) frameworks built from charged components or metallotectons offer diverse guest-framework interactions for target-specific separations. We present here a study to systematically explore the coordination chemistry of monovalent halide anions, i.e., F- , Cl- Br- and I- with aim develop hybrid H-bond synthons that enable controllable construction microporous H-bonded exhibiting fine-tunable surface polarity within adaptive cavities realistic xenon/krypton (Xe/Kr) separation. The spherical especially are found readily participate in charge-assisted H-bonding assembly well-defined behaviors, resulting robust bearing open anions distinctive 1D pore channels. activated show preferential binding towards Xe (IAST Xe/Kr selectivity ca. 10.5) because enhanced polarizability confinement effect. Specifically, dynamic column separation record-high factor (SF=7.0) among was achieved, facilitating an efficient dilute, CO2 -containing gas streams exactly mimicking off-gas spent nuclear fuel (SNF) reprocessing.

Язык: Английский

---

Palygorskite‐Derived Ternary Fluoride with 2D Ion Transport Channels for Ampere Hour‐Scale Li‐S Pouch Cell with High Energy Density

Advanced Materials, Год журнала: 2023, Номер 36(4)

Опубликована: Ноя. 28, 2023

Abstract Although various excellent electrocatalysts/adsorbents have made notable progress as sulfur cathode hosts on the lithium‐sulfur (Li‐S) coin‐cell level, high energy density ( W G ) of practical Li‐S pouch cells is still limited by inefficient Li‐ion transport in thick under low electrolyte/sulfur (E/S) and negative/positive (N/P) ratios, which aggravates shuttle effect sluggish redox kinetics. Here a new ternary fluoride MgAlF 5 ·2H 2 O with ultrafast ion conduction–strong polysulfides capture integration developed. has an inverse Weberite‐type crystal framework, corner‐sharing [AlF 6 ]–[MgF 4 (H O) ] octahedra units extend to form two‐dimensional channels along [100] [010] directions, respectively. Applied host, lithiated LiTFSI (lithium salt electrolyte) acts fast ionic conductor ensure efficient accelerate kinetics S loadings E/S N/P. Meanwhile, strong polar captures chemisorption suppress effect. Therefore, 1.97 A h‐level cell achieves 386 Wh kg −1 . This work develops new‐type conductor, provides unique insights for designing cells.

Язык: Английский

---

Uniform lithium deposition regulated by lithiophilic Mo3N2/MoN heterojunction nanobelts interlayer for stable lithium metal batteries

Chemical Engineering Journal, Год журнала: 2023, Номер 476, С. 146612 - 146612

Опубликована: Окт. 10, 2023

Язык: Английский

---

Enhanced lithium-ion conductivity and interficial stability of Li-IL@Fe-BDC composite polymer electrolytes for solid-state lithium metal batteries

Green Chemistry, Год журнала: 2024, Номер 26(7), С. 4168 - 4180

Опубликована: Янв. 1, 2024

The Li-IL@Fe-BDC material successfully confines Li-ILs among Fe-BDCs, releasing more free lithium ions in the PEO matrix, and LFP/CPE3/Li battery is stabilized for 700 cycles at 1 C.

Язык: Английский

---