Work

Electrolyte With Functionalized Boron Nitride Nanosheets for Dendrite‐Free Lithium Metal Anodes

Year: 2026

Type: article

Abstract: ABSTRACT Lithium metal batteries (LMBs) are regarded as promising candidates for the next‐generation high‐energy‐density storage systems due to their unparalleled theoretical energy density and low redox potential. However, the commercialization of LMBs is tremendously plagued by the barbaric growth of lithium dendrite and the intricate decomposition of electrolytes. Herein, the tailored boron nitride nanosheets (BNNSs) with hydroxyl (BNNSs‐OH) and amidogen (BNNSs‐NH 2 ) functional groups are used as electrolyte additives to improve ion transport of the electrolyte and interface compatibility with lithium metal anode (LMAs). The BNNSs‐NH 2 ‐based electrolyte exhibits superior Li + deposition behavior due to the stronger electrostatic interaction between ‐NH 2 groups and TFSI − anions, and the modified electrolyte shows obvious advantages in balancing Li + concentration gradients and enhancing the lithium‐ion transference number. Therefore, the lithium‐ion transference number of the BNNSs‐NH 2 ‐based LMBs increases to 0.61. The Li||BNNSs‐NH 2 ||Li symmetric cell cycles stably over 1200 h at a current density of 0.5 mA cm −2 , and the average Coulombic efficiency of the Li||BNNSs‐NH 2 ||Cu asymmetric cell reaches up to 97.01% after 300 cycles at 0.5 mA cm −2 . In addition, the specific capacity of the LiFePO 4 ||BNNSs‐NH 2 ||Li full cell is 120.26 mAh g −1 after 600 cycles at 3C, corresponding to the capacity retention of 96.34%. This work provides a new strategy for homogenizing the ion deposition and enhancing the Li + transport through the tailored electrolyte additives, laying a theoretical foundation for the practical application of lithium metal batteries with high‐energy‐density.

Source: Rare Metals

DOI: 10.1002/rar2.70122

Authors: Ji Zhou, Simin Chai, Yijian Song, Yaqin Zhou, Yuanlang Wan, Anqiang Pan

Institutions: Central South University, Hunan University of Technology, Xinjiang University

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,190