In Situ Construction of Zwitterionic Polymer Electrolytes with Synergistic Cation–Anion Regulation Functions for Lithium Metal Batteries

Abstract

Here, inspired by the unique mesh geometry of fishing nets and the knotted fiber structures that can simultaneously enhance both the strength and deformability of the materials, new crosslinkers and elastic components into the polyzwitterionic electrolytes to construct high‐strength and ultra‐flexible fishing‐net‐like structure electrolytes are introduced. Specifically, the crosslinker rich in –NH can not only form chemical crosslinking points between polyzwitterion and elastic segments, but also physical crosslinking points, resulting in high strength of the electrolytes. Additionally, the elastic segments provide the electrolytes with super flexibility, strongly reducing the interface resistance of devices. Moreover, the backbone of polymers can collectively regulate anions and Li+, realizing stable Li+ deposition and suppressing the growth of lithium dendrites. As a consequence, the Li||Li symmetric cell can be stably cycled at 0.1 mA h−1 for over 5500 h at 30 °C, and the assembled Li/LiFePO4 (LFP) and Li/ LiNi0.8Co0.1M0.1 (NCM 811) cells both show good cell performances at various C‐rates at 30 °C. This work provides a new perspective for the construction of polymer electrolytes with synergistic cation–anion regulation functions for high safety and high energy density solid‐state lithium batteries.

Encapsulating Multielectron CoCO3 Spindle-like Nanoclusters in 3D Ascorbic Acid Preintercalated Porous Ti3C2Tx MXene Architectures toward Superior Lithium Storage

“…The relative electrochemical reactions of the CoCO 3 /AA-Ti 3 C 2 T x electrode are listed below. 6,55 Reduction process (lithiation)…”

“…During the anodic scan, the two anodic peaks at 1.3 and 2.1 V are related to the multistep delithiation reaction from Li 2 O and Li x C 2 to CoCO 3 . , Furthermore, CV curves almost overlap during the following scans, indicating the outstanding cycling stability of the CoCO 3 /AA-Ti 3 C 2 T x electrode. The relative electrochemical reactions of the CoCO 3 /AA-Ti 3 C 2 T x electrode are listed below. , …”

“…Currently, with the rising demand for portable electronics, electric or hybrid vehicles, and large-scale power grid systems, tremendous efforts have been made to focus on the next-generation energy storage and conversion devices with low cost, high power density, and safe reliability. − Rechargeable lithium-ion batteries (LIBs) have attracted considerable attention in practical commercialization and renewable energy utilization and are widely used in different aspects of modern society and technology. − However, a low theoretical specific capacity (only 372 mA h g –1 ) of commercial graphite material severely inhibits the practical energy density of LIBs. , To this end, designing advanced anode materials with superior rate capability and superb cycle life to facilitate the rapid application development of LIBs still remains a grand challenge …”

Dual surface/bulk engineering of Nb2O5 for high‐rate sodium storage

“…Sodium-ion capacitors (SICs) have gained significant attention in recent years due to their fast-charging capabilities, low cost, and availability of raw materials. [1][2][3][4][5][6][7][8][9][10][11][12] Orthorhombic Nb 2 O 5 (T-Nb 2 O 5 ) is a pseudocapacitive material that holds great promise as a high-rate anode for sodium storage. [13][14][15][16] However, the low electronic conductivity of T-Nb 2 O 5 remains a significant challenge, and current research efforts are primarily focused on improving its conductivity at the surface and bulk levels.…”

“…Sodium‐ion capacitors (SICs) have gained significant attention in recent years due to their fast‐charging capabilities, low cost, and availability of raw materials 1‐12 . Orthorhombic Nb 2 O 5 ( T ‐Nb 2 O 5 ) is a pseudocapacitive material that holds great promise as a high‐rate anode for sodium storage 13‐16 .…”