Article
Chemistry, Physical
Miaoran Li, Ying Zhu, Xiaodong Wu, Yimin Lei, Xuexia He, Qi Li, Ruibin Jiang, Zhibin Lei, Zonghuai Liu, Jie Sun
Summary: In this study, nitrogen-doped titanium monoxide (N-TiO) nanospheres were synthesized and demonstrated to possess excellent electrochemical performance, highlighting the impact of nitrogen doping on metal oxides.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoshi Lang, Ruiyin Ren, Xinxi Wang, Lan Li, Kedi Cai
Summary: Cu2+ regulated Fe2O3 nanospheres were prepared as high-performance matrixes for sulfur composite cathodes of lithium-sulfur batteries via a facile hydrothermal method, effectively solving the issues of sulfur insulation, volume alternation, and shuttle effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Yanqun Bai, Thanh Tuan Nguyen, Rongrong Chu, Nam Hoon Kim, Joong Hee Lee
Summary: Lithium-sulfur batteries, with high theoretical energy density and cost-effectiveness, face challenges such as the shuttle effect and sluggish conversion reaction. This study proposes a novel strategy by designing a hollow titanium oxide nanosphere decorated with vanadium phosphide nanosheets as an efficient sulfur host, which shows excellent performance in experimental results.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Sung Joon Park, So Yeon Yang, Sang A. Han, Yun Jeong Choi, Taehee Kim, Min-Sik Park, Jung Ho Kim, Ki Jae Kim
Summary: By coating ordered mesoporous Mn2O3 (m-Mn2O3) and highly conductive Super P (SP) on polyethylene (PE) separators, we have designed a multifunctional composite separator to enhance the reversibility and cycling stability of lithium-sulfur batteries (LSBs). The m-Mn2O3 offers fast chemisorption of polysulfides dissolved in electrolyte, and the highly conductive SP physically mitigates the crossover of polysulfides and reversibly reutilizes them during cycling. In practice, the LSB cell assembled with the separator coated with m-Mn2O3 and SP delivers a high reversible capacity of 553 mAh g-1 at a current density of 0.5 C, even after 300 cycles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xiaogang Gao, Ying Huang, Xiang Li, Heng Gao, Tiehu Li
Summary: By synthesizing the advanced sulfur immobilizer SnP0.94@PHCA, the challenges of shuttle effect and reutilization of sulfur/lithium polysulfides (LiPSs) in Li-S batteries have been effectively addressed, resulting in excellent specific capacity, superior rate performance, and cycling stability of sulfur under high sulfur loading conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Xianwei Geng, Ruowei Yi, Xiangfei Lin, Chenguang Liu, Yi Sun, Yingchao Zhao, Yinqing Li, Ivona Mitrovic, Rui Liu, Li Yang, Cezhou Zhao
Summary: A high-performance method for preparing lithium-sulfur batteries is proposed, and the batteries fabricated with composite materials exhibit high specific capacity and stable cycle life. The study demonstrates that SWCNT can enhance the conductivity of the composite, while the strong adsorption ability of TiO2 can increase the cycle life of the battery.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Avinash Raulo, Sajan Singh, Amit Gupta, Rajiv Srivastava, Bhanu Nandan
Summary: A heterostructure composed of CoFe2O4 and SnO2 decorated on a carbon nanofiber framework is reported as a sulfur redox catalyst in lithium-sulfur batteries, which shows efficient lithium polysulfide entrapment and conversion, providing excellent cyclability and performance even at high sulfur loadings.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Gi Dae Park, Jung-Kul Lee, Yun Chan Kang
Summary: Porous and graphitic carbon materials are actively studied for Li-S batteries. However, the dissolution of lithium polysulfides in the electrolyte is a problem. This study proposes a strategy of depositing ultrafine TiOx nanodots on active sulfur embedded within hollow porous carbon nanospheres to form a polar coating layer, which effectively blocks the diffusion of soluble polysulfides.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Su Hyun Yang, Jang Min Choi, Rakesh Saroha, Sung Woo Cho, Yun Chan Kang, Jung Sang Cho
Summary: The introduction of functional interlayers for efficient anchoring of lithium polysulfides has received significant attention worldwide. In this study, hollow porous carbon nanospheres (HPCNSs) impregnated with metallic and polar cobalt sulfide (Co9S8) nanocrystals (abbreviated as Co9S8@HPCNS) were prepared and used as electrocatalytic interlayers for Li-S batteries. The electrochemical performance of Li-S cells with Co9S8@HPCNS as interlayers and regular sulfur electrodes showed improved rate performance and cycling stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Donghee Gueon, Jisu Yoon, Jinhan Cho, Jun Hyuk Moon
Summary: In this study, the application of amorphous titanium suboxide (a-TiOx) in lithium-sulfur batteries was investigated. The results showed that a-TiOx strongly adsorbs lithium polysulfides but weakly adsorbs lithium sulfide. With the presence of a-TiOx, the batteries exhibited high conversion of lithium sulfide and high sulfur utilization, as well as maintained high capacity and stability.
Article
Chemistry, Physical
Nattida Yamsang, Jarinya Sittiwong, Pemikar Srifa, Bundet Boekfa, Montree Sawangphruk, Thana Maihom, Jumras Limtrakul
Summary: This study investigates the potential of graphitic carbon nitride nanosheet (g-C3N4) and its heteroatoms as chemical anchoring materials for suppressing the dissolution of intermediate lithium polysulfide species (LiPSs) into the liquid electrolyte in lithium-sulfur batteries. The introduction of dopant atoms such as B and P on g-C3N4 is found to stabilize LiPSs through lithium bond interaction, providing optimum adsorption energies for LSBs anchoring. However, O- and S-doped g-C3N4 show weaker adsorption, and electron transfers and van der Waals interactions play significant roles in LiPSs adsorption. Overall, this research offers fundamental insights into surface tuning of g-C3N4 by doping heteroatoms to reduce the shuttle effect, benefiting the development of advanced LSBs.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sheng-Heng Chung, Yi-Hsuan Wu, Yu-Hsun Tseng, Thi Xuyen Nguyen, Jyh-Ming Ting
Summary: High entropy oxides (HEOs) act as functional polysulfide trappers in lithium-sulfur batteries, improving electrochemical stability by adsorbing and converting polysulfides.
Article
Engineering, Environmental
Eunji Kim, Jihun Kim, Taewoong Lee, Haisu Kang, Seunggun Yu, Jun-Woo Park, Seung Geol Lee, Oi Lun Li, Jin Hong Lee
Summary: This study prepared N, S dual-doped carbon materials and applied them in Li-S batteries, successfully reducing cell polarization and effectively alleviating the lithium polysulfide shuttling behavior, resulting in improved specific capacity of the battery.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Kunyang Zou, Weitao Jing, Xin Dai, Xinxing Chen, Ming Shi, Zhiyin Yao, Ting Zhu, Junjie Sun, Yuanzhen Chen, Yan Liu, Yongning Liu
Summary: A modified template method was proposed to synthesize nitrogen/oxygen dual-doped honeycomb-like carbon as a sulfur host, which offers physical entrapment and chemical adsorption/catalytic conversion sites for polysulfides, resulting in high sulfur loading and specific capacity. This structure provides a new strategy for constructing polysulfide confinement structures to achieve robust Li-S batteries.
Article
Materials Science, Ceramics
Shanshan Yao, Youqiang Wang, Yazhou Liang, Heli Yu, Arslan Majeed, Xiangqian Shen, Tianbao Li, Shibiao Qin
Summary: By introducing La2O3 nanorods modified Ketjen black@sulfur composite, the issues of Li-polysulfides shuttling and sluggish electrochemical kinetics in lithium-sulfur batteries are addressed, with La2O3 nanorods playing a key role in the adsorption and catalytic performance of polysulfides, accelerating the redox kinetics.
CERAMICS INTERNATIONAL
(2021)