Cobalt hydroxide decorating N-doped hollow carbon sphere as a new sulfur host to improve long cycle stability in lithium–sulfur batteries

Lai, Xianxin; Fan, Kaibo; Zhang, Zhiqi; Cai, Lili; Zhu, Zhongheng; Huang, Haozhong; Zhang, Qishen; Sun, Ling; Zhou, Zhehui; Wang, Li; Hu, Zhengguang; Zhao, Yong

doi:10.1007/s11581-024-05390-y

Cited by 1 publication

(1 citation statement)

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“…Solutions have already been devised for these problems in Li-S batteries, where good-conductivity cathode hosts, such as carbonaceous or MoS 2 hosts, are employed with pores to accommodate the sulfur expansion when it converts to Me 2 S m . Carbonaceous or other conductive hosts include hollow particles with microporous walls [16][17][18][19][20][21], activated carbon (AC) coatings [16,[22][23][24][25][26][27][28][29][30] or AC fabrics [16,[29][30][31][32][33][34], graphene [16,[35][36][37][38][39][40][41][42][43], or carbon nanotubes [44][45][46][47][48][49][50]. 1T-MoS 2 cathode hosts have also proved very efficient for Li-S batteries [51,52] as they trap polysulfides and reduce their shuttling effect, while also acting as electrocatalysts [52,53].…”

Section: Introductionmentioning

confidence: 99%

An Investigation into Electrolytes and Cathodes for Room-Temperature Sodium–Sulfur Batteries

Adeoye,

Tennison,

Watts

et al. 2024

Batteries

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In the pursuit of high energy density batteries beyond lithium, room-temperature (RT) sodium–sulfur (Na-S) batteries are studied, combining sulfur, as a high energy density active cathode material and a sodium anode considered to offer high energy density and very good standard potential. Different liquid electrolyte systems, including three different salts and two different solvents, are investigated in RT Na-S battery cells, on the basis of the solubility of sulfur and sulfides, specific capacity, and cyclability of the cells at different C-rates. Two alternative cathode host materials are explored: A bimodal pore size distribution activated carbon host AC MSC30 and a highly conductive carbon host of hollow particles with porous particle walls. An Na-S cell with a cathode coating with 44 wt% sulfur in the AC MSC30 host and the electrolyte 1M NaFSI in DOL/DME exhibited a specific capacity of 435 mAh/gS but poor cyclability. An Na-S cell with a cathode coating with 44 wt% sulfur in the host of hollow porous particles and the electrolyte 1M NaTFSI in TEGDME exhibited a specific capacity of 688 mAh/gS.

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