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Related Experiment Video

Updated: Jul 3, 2026

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

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Published on: November 10, 2014

B-Nb-C Bond-Mediated Heterogeneous Interface Passivation for Enhanced Li-S Battery Performance.

Zhong-Ou Yang¹, Jieyuan Zhou¹, Ying Wang¹

¹School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou 221116, P. R. China.

ACS Applied Materials & Interfaces

|May 6, 2026

Summary

Niobium boride (NbB2) catalysts poison lithium-sulfur batteries due to strong sulfur affinity. This study developed NbB2@boron-doped carbon nanowires, creating a B-Nb-C bond interface to prevent poisoning and enhance battery performance.

Keywords:

Li–S battery catalysis heterogeneous interface modified separator niobium boride passivated surface

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Niobium boride (NbB2) exhibits promising catalysis for lithium-sulfur batteries but suffers from catalyst poisoning due to strong sulfur affinity.
Existing heterogeneous coatings have weak interfacial contact and high resistance, limiting their effectiveness.

Purpose of the Study:

To develop a novel interface engineering strategy for NbB2-based electrocatalysts to overcome poisoning in lithium-sulfur batteries.
To create a poison-resistant catalyst with enhanced interfacial properties for improved battery performance.

Main Methods:

Fabrication of NbB2@boron-doped carbon (NbB2@BC) core-shell nanowires.
Utilizing DFT theoretical calculations and experimental validation to investigate interfacial properties.
Separator modification with the developed NbB2@BC material.

Main Results:

A spontaneous built-in electric field (BIEF) and B-Nb-C chemical bonds were formed at the NbB2@BC interface.
The interface engineering strategy weakened NbB2's sulfur adsorption and accelerated polysulfide conversion and electron transfer.
The modified separator (NbB2@BC/PP) achieved a high capacity (912.7 mAh g-1) and excellent cycling stability (87% retention) under demanding conditions.

Conclusions:

The B-Nb-C bond-mediated interface passivation effectively prevents catalyst poisoning in lithium-sulfur batteries.
This innovative strategy offers a pathway for developing robust and high-performance electrocatalysts for advanced energy storage devices.