Lithium-sulfur (Li-S) batteries are hampered by the infamous shuttle effect and slow redox kinetics, resulting in rapid capacity decay. Herein, a bifunctional catalysis CoB/BN@rGO with integrated structure and synergy effect between adsorption and catalysis is proposed to solve the above problems. The integrated CoB and BN are simultaneously and uniformly introduced on the rGO substrate through a one-step calcination strategy, applied to modify the cathode side of PP separator. The transition metal borides can catalyze the conversion of lithium polysulfides (Li₂S_n, n ≥ 4), whereas the bond of B-S is too weak to absorb LPS. Thus BN introduced can effectively restrict the diffusion of polysulfides via strong chemisorption with LiS_nLi⁺ ⋯N, while the rGO substrate ensures smooth electron transfer for redox reaction. Therefore, through the integrated adsorption/catalysis, the shuttle effect is suppressed, the kinetics of redox reaction is enhanced, and the capacity decay is reduced. Using CoB/BN@rGO modified PP separator, the Li-S batteries with high initial capacity (1450 mAh g⁻¹ at 0.35 mA cm⁻²) and long-cycle stability (700 cycles at 1.74 mA cm⁻² with a decay rate of 0.032% per cycle) are achieved. This work provides a novel insight for the preparation of bifunctional catalysis with integrated structure for long-life Li-S batteries.

臭名昭著的穿梭效应和缓慢的氧化还原动力学阻碍了锂硫（Li-S）电池的使用，从而导致容量快速衰减。为了解决上述问题，本文提出了一种结构整合，吸附与催化协同作用的双功能催化CoB / BN @ rGO。通过一步煅烧策略将集成的CoB和BN同时均匀地引入到rGO基板上，用于修饰PP隔膜的阴极侧。过渡金属硼化物可以催化多硫化锂转化（栗₂小号_Ñ，Ñ ≥4），而BS的键太弱吸收LPS。因此，引入的氮化硼可以通过LiS _n Li的强化学吸附作用有效地限制多硫化物的扩散⁺ ⋯N，而rGO底物可确保平滑的电子转移以进行氧化还原反应。因此，通过整合的吸附/催化，抑制了穿梭效应，增强了氧化还原反应的动力学，并减少了容量衰减。使用CoB / BN @ rGO改性的PP隔膜，Li-S电池具有很高的初始容量（0.35 mA cm ^-2时为1450 mAh g ^-1）和长周期稳定性（在1.74 mA cm ^-2时为700次循环，具有衰减率）达到每周期0.032％的值）。这项工作为制备长寿命Li-S电池具有集成结构的双功能催化提供了新颖的见解。