Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Abstract

Constructing a stable solid electrolyte interphase (SEI) at the electrode–electrolyte interface is powerful for optimizing the battery performance. However, studies related to interface chemistry have particularly focused on engineering electrolytes and overlooked regulating electrode materials. Here, this study reports that the B‐doped Bi interconnected nanoparticles (B─Bi) are prepared by a facile and effective chemical reduction reaction. The B doping helps to catalyze the electrolyte decomposition and more NaF formation on the electrode surface, which facilitates a stable uniform SEI with enhanced mechanical stability. Such a robust SEI layer can inhibit the further decomposition of electrolytes and promote the interfacial Na+ transfer. The B─Bi offers a reversible capacity of 403.1 mAh g−1 at 1.0 A g−1 and a high rate capability of 203 mAh g−1 at 80 A g−1. Moreover, the B‐doping method also finds its viability to stabilize SEI in Sb material. This study demonstrates a new strategy for engineering the interface chemistry toward stable SEI and excellent performance.

Te doped 1T/2H-MoSe2 nanosheets with rich defects as advanced anode materials for high-rate sodium ion half/full batteries

“…After that, the capacity increase is mainly attributed to the gradual activation process of the overall electrode and enhanced capacitance contribution due to the material pulverization upon cycling. 43–48 Furthermore, Fig. 3f exhibits the high-rate cycling performance at an ultra-high rate of 10 A g −1 .…”

Modulating Internal Coordination Configurations for High‐Density Atomic Antimony toward Advanced Fast‐Charging Sodium‐Ion Batteries

“…Moreover, the dense Sb─O─C/Sb─S─C interfacial chemical bonds not only enhance the interfacial transport efficiency but also limit the aggregation of Sb single atoms during the reaction process, ultimately leading to significant improvements in the structural stability and reaction reversibility of Sb SA/PC-1 and Sb SA/PC-2. [33] Although Sb SA/PC-3 exhibited a high specific capacity after cycling for the initial 100 cycles, the corresponding plateaus and redox peaks of the alloying/dealloying reaction gradually disappeared from 100 loops to 1000 loops, and the final specific capacity was very low. Thus, it can be inferred that the overloaded Sb atoms in Sb SA/PC-3 readily agglomerate during long-term electrochemical reactions and that the presence of Sb metal exacerbates the volume expansion, contributing to the poor structural stability of Sb SA/PC-3.…”

Doping Engineering in Electrode Material for Boosting the Performance of Sodium Ion Batteries

“…However, due to the large size of Na + , the cycling stability and energy density are not up to the mark for the recent demands. The limitations associated with the high performance energy storage devices have been addressed over the past decades via various methodologies such as doping, coating, nanostructuring, material interface engineering, or some other engineering. − …”