Multifunctional effects of hollow flower-like CoTiO3 microspheres wrapped by reduced graphene as sulfur host in Li-S battery

He, Xiangming; Li, Beijun; Lei, Zehua; Liu, Hui; Wang, Shaolan; Qiao, Tong; Feng, Yanqi; Wang, Xinzhen

doi:10.1016/j.jcis.2022.07.015

Cited by 7 publications

(1 citation statement)

References 53 publications

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“…In addition, the GCD profiles at different rates of NiMoO 4 −PP and NiO−PP cells are shown in Figure 6d and Figure S7a. Higher polarization could be exhibited at large current densities due to slower kinetics and increased electrochemical resistance [46] . Apparently, NiMoO 4 −PP separator still demonstrates the longest second plateau and the lowest polarization at high current rates compared to NiO−PP separator, which could be attributed to the faster kinetics and higher sulfur utilization of NiMoO 4 .…”

Section: Resultsmentioning

confidence: 94%

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Dou

Zhao

et al. 2023

ChemNanoMat

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Lithium-sulfur (LiÀ S) batteries are considered to be the most promising candidates for achieving low-cost, highenergy density systems. The serious shuttle effect of polysulfides (LiPS) and the sluggish redox kinetics have become major obstacles to the practical application of LiÀ S batteries. Herein, a hollow microsphere structure of transition bimetallic oxide nickel molybdate (NiMoO 4 ) was prepared by hydrothermal reaction and calcination method. It was used as a separator coating material to inhibit LiPS shuttle and promote efficient redox conversion of sulfur species. The hollow microsphere structure not only possesses a large internal space to physically confine LiPS but also exposes abundant active sites to enhance the redox kinetics of LiPS. The NiMoO 4 shows superior adsorption ability for LiPS and accelerated ion/electron transport rates compared to NiO, thus facilitating the anchoring-conversion-diffusion processes of polysulfides. Benefiting from this versatility, the LiÀ S batteries with NiMoO 4 -PP exhibit a high discharge specific capacity of 1354.5 mAh g À 1 at 0.1 C. In addition, the battery exhibits excellent cycling stability with a capacity decay rate of 0.027% for 500 cycles at 2 C. These results demonstrate the potential application of NiMoO 4 -based electrocatalysts in high-performance LiÀ S batteries.

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Section: Resultsmentioning

confidence: 94%