Article
Nanoscience & Nanotechnology
Xiaohong Zou, Zhichao Cheng, Qian Lu, Kaiming Liao, Ran Ran, Wei Zhou, Zongping Shao
Summary: By creating a LiI protective layer on the Li metal anode, this study effectively suppressed dendrite growth, resulting in improved charging voltage stability and cycle life of the Li-O-2 battery.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Shan Yang, Ru Xiao, Tianzhao Hu, Xialu Fan, Ruogu Xu, Zhenhua Sun, Benhe Zhong, Xiaodong Guo, Feng Li
Summary: Lithium-sulfur batteries show promise as next-generation energy storage devices, but face challenges such as shuttle effect and Li dendrite growth. This study demonstrates the use of Ni2P-HCS as an efficient mediator for Li-S batteries, achieving excellent rate capability and long-term cycling stability. The loading coefficient and catalytic effectiveness value are proposed to evaluate the catalytic efficiency of electrocatalysts.
Article
Chemistry, Multidisciplinary
Yifan Ding, Zixiong Shi, Yingjie Sun, Jianghua Wu, Xiaoqing Pan, Jingyu Sun
Summary: A generic and simple material strategy has been presented to fabricate advanced mediator for improved sulfur electrochemistry. The Li-S cells derived from this strategy exhibit impressive cyclic performances and durable areal capacity, indicating the potential for rationalizing the design and modulation of reliable polysulfide mediators in Li-S batteries.
Article
Energy & Fuels
Zhong Li, Peiyue Yang, Qiyun Pan, Shan Jiang, Linjie Jiang, Yisi Liu, Guodong Xu, Yazhou Chen
Summary: The encapsulated sulfur electrode effectively addresses the shuttle effect of internal polysulfides, improving the cyclic performance of the battery.
Article
Nanoscience & Nanotechnology
Deqing Cao, Xiaojing Liu, Xinhai Yuan, Fengjiao Yu, Yuhui Chen
Summary: Rechargeable Li-CO2 batteries directly using CO2 as the reactant have the potential for deeper energy storage penetration and CO2 utilization, but face challenges. The addition of a redox mediator phenoxathiin has been found to reduce over-potential during charging and provide insights into the reaction mechanism of the Li-CO2 battery.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Yinwei Fu, Xiaofeng Lei, Huiming Yin, Xizheng Liu
Summary: By utilizing a gradient RM gel electrolyte, flexible lithium-air batteries can achieve higher mid-charging potentials, improved cycle performance and energy efficiency, as well as extended battery life. The gel electrolyte also offers device flexibility, allowing laminated cells to operate under harsh bending conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Yilan Wu, Chan Lei, Jing Li, Yijie Chen, Hongshan Liang, Yan Li, Bin Li, Xiaogang Luo, Ying Pei, Shilin Liu
Summary: This study aimed to improve the stability of medium internal phase emulsion by adjusting the electrostatic interaction between gelatin and TEMPO-oxidized bacterial cellulose nanofibrils. The addition of TOBC significantly improved the emulsion stability by impeding droplet mobility with the formation of nanofibrils network.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Physical
Danzheng Zhou, Jian Zhang, Tengfei Bian, Yuanfang Tao, Xiao Liu, Qing Han, Zewen Liu, Silei Chen, Jin Wang, Peng Zhang, Yong Zhao
Summary: This study demonstrates a method to improve the cycling performance of lithium-oxygen batteries under high capacity conditions by using a redox mediator, D-TEMPO, which promotes the electron transfer between the electrode and Li2O2.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Zhijia Zhang, Yuanyuan Yang, Wei Guo, Ganggang Chang, Junsheng Li
Summary: Lithium-sulfur (Li-S) batteries have the potential to be next-generation energy storage systems due to their high energy density and low cost. However, the shuttle effect caused by polysulfides remains a challenge for their practical application. In this study, a flexible carbonized bacterial cellulose layer was prepared, which effectively captures polysulfides and facilitates their electrochemical conversion. As a result, the battery with this layer achieved stable discharge performance and high rate capacity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Runlan Li, Qian Liu, Wenbo Yue
Summary: The study successfully improved the performance of Li-S batteries by preparing CMK-3 @CeO2 as the sulfur host, enhancing the cycling stability and discharge capacity of sulfur. This work provides a new perspective for designing more metal oxide-decorated sulfur hosts in the future.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Kunyao Peng, Pei Tang, Qianqian Yao, Qingyun Dou, Xingbin Yan
Summary: In this study, N-fluoropyridinium (ArF+) bis(trifluoromethane)sulfonimide (TFSI-) was added as an electrolyte additive to protect lithium metal through both solid electrolyte interphase (SEI) protection and electrostatic repulsion mechanisms. The ArF+ cations formed a protective SEI layer on the lithium surface and acted as a cationic repellent during lithium deposition, leading to improved cycle performance of lithium symmetric cells and lithium parallel to LiFePO4 full cells.
Article
Polymer Science
Ming Yan, Chuanshan Zhao, Xia Li
Summary: In this study, a composite separator Bacterial cellulose/Ketjen black-TiO2 (BKT) was prepared and demonstrated to be a promising material for lithium-sulfur batteries (LSBs). The BKT separator exhibited high electrolyte wettability, thermal stability, and tensile resistance, effectively inhibiting the shuttle effect and improving the cycle life and capacity retention of LSBs.
Article
Materials Science, Paper & Wood
Wenyue Li, Shu Wang, Zhaoyang Fan, Shiqi Li, Nathan Newman
Summary: This study reports the use of bacterial cellulose (BC) modified by SiO2 nanoparticles (NPs) as a separator material for lithium-metal batteries (LMBs) and lithium-sulfur batteries (LSBs). The composite BC/SiO2 film enables smooth lithium-ion flux, regulated lithium deposition, and suppressed polysulfide shuttling, resulting in improved stability and performance.
Article
Chemistry, Applied
Jingxue Li, Liqin Dai, Zhefan Wang, Hao Wang, Lijing Xie, Jingpeng Chen, Chong Yan, Hong Yuan, Hongliang Wang, Chengmeng Chen
Summary: In this study, a free-standing cellulose nanofiber (CNF) separator was designed and fabricated to address the issues of polysulfides shuttle and dendrite growth in Lithium-sulfur batteries (LSBs). The CNFs with abundant polar oxygen-containing functional groups were able to chemically immobilize the polysulfides and control the surface morphology of the SEI on lithium metal, thereby suppressing dendrite formation. The pore structure of the membrane was fine-tuned by adjusting the isopropanol content in the suspension to achieve optimal electrochemical performance.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Electrochemistry
Zhihua Wang, Jingjing Zhang, Hai Kang, Yilin Liu, Minghua Wang, Hanping Zhang
Summary: The Li1+xMn2O4 material produced by in-situ lithium intercalation of LiMn2O4 can improve the performance of Li-S batteries by enhancing conversion kinetics and reducing lithium-ion diffusion barriers.
ELECTROCHIMICA ACTA
(2022)