Article
Chemistry, Physical
Jiayi Li, Yizhuo Zhang, Rong Shang, Chen Cheng, Yan Cheng, Jianxin Xing, Zhenzhen Wei, Yan Zhao
Summary: Advancements in separator technology for lithium-ion batteries have been developed to ensure safety, service life, and user experience. The focus is on incorporating thermal shutdown functions to prevent safety issues caused by elevated temperatures. Growing demand for recycling and sustainability has led to the development of functional separators with irreversible or reversible thermal shutdown ability for future utility and manufacture.
ENERGY STORAGE MATERIALS
(2021)
Article
Energy & Fuels
Dean Chou, Yu-Hao Cheng
Summary: This study investigates the mechanical response of a battery separator and its impact on battery performance. Simulating the displacement and pore pressure of the separator under different charge/compression rates, it is found that the stress-strain curve of the separator exhibits a wave pattern in the fully dynamic model, while this phenomenon is not observed in the quasi-static model. The maximum displacement and pore pressure increase with the compression rate, and the pore pressure fluctuates during compression in the fully dynamic model.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Chemical
Jingren Gou, Wangyu Liu, Aimin Tang
Summary: A novel method has been proposed to fabricate a nanocellulose based separator with high porosity and multiscale pore structure, improving the electrochemical performances of lithium ion batteries. Although the mechanical strength of the separator is weakened, the battery test proves that the capacity retention and rate capability meet the requirements.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Yang Wang, Minhao Guo, Hui Fu, Zhenzhong Wu, Yizhe Zhang, Guojie Chao, Suli Chen, Longsheng Zhang, Tianxi Liu
Summary: This article presents a facile and scalable strategy to prepare thermotolerant separators of cross-linked PI fibers with a narrowed pore size via blended electrospinning and thermal imidization. The resulting separator exhibits higher porosity, better electrolyte adsorption, and higher ionic conductivity, leading to greatly enhanced electrochemical performance in lithium-ion batteries.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Tingting Gao, Peng Tian, Qianjin Xu, Hongchang Pang, Junwei Ye, Guiling Ning
Summary: A study found that by adjusting hydrothermal temperatures, a class of boehmite particles with different grain sizes was synthesized and used to fabricate boehmite/polyacrylonitrile (BM/PAN) membranes. All of these BM/PAN membranes can maintain excellent thermal dimensional stability above 200 degrees C and have good electrolyte wettability and high porosity. Compared with Celgard 2325, lithium-ion batteries assembled with the best BM/PAN separator exhibit different thermal stability phenomena at 150 degrees C and have excellent rate performance and cycle stability at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hongyan Yao, Liting Yan, Jianxing Shen, Tailin Wang, Pan Chen, Xiaotong Cong, Shuo Zhang, Huimin Jiang, Xuebo Zhao
Summary: This paper proposes a method to functionalize traditional commercial polypropylene separators by coating them with Metal-Organic Frameworks (MOFs) in order to regulate ion transport and inhibit the formation of lithium dendrites. The new strategy is controllable and universal, and can be used to prepare separators with outstanding performances by accurately tuning the MOF structure.
APPLIED SURFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Nan Wang, Wenyong Liu, Haiyang Liao, Zhihan Li, Yi Chen, Guangsheng Zeng
Summary: Pure cellulose nanofiber (CNF) separators for high-performance lithium-ion batteries (LIBs) were prepared using CNF as the matrix and tert-butyl alcohol (TBA) as the dispersion medium by a facile filtration method. The freeze-dried separator at -80 degrees C with TBA as the dispersion medium (TBA-FD) exhibited the best performance, with high porosity, electrolyte uptake, and ionic conductivity. The CNF separators showed good thermal stability and demonstrated superior cycling stability and rate performance in LIBs.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Yi Liu, Chunxing Li, Chao Li, Zhenye Liang, Xueshan Hu, Hao Liu, Ze Zhang, Meng Cui, Gang Chen, Jiayu Wan, Xiangwu Zhang, Jinsong Tao
Summary: Traditional polyolefin-based separators have poor thermal stability and weak electrolyte wettability. In this study, a unique hydroxyapatite/cellulose nanofiber hybrid separator was fabricated using hydroxyapatite and cellulose nanofibers as raw materials. The hybrid separators showed excellent thermal properties, outstanding flame retardancy, and improved electrolyte wettability, resulting in better performance of the lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Chemical
Longhui Li, Mengyuan Zhou, Ruoyu Xiong, Xuyang Wang, Guancheng Shen, Shuang Sun, Yifu Chen, Tianlun Huang, Huamin Zhou, Yun Zhang
Summary: The study presents a high-safety lithium-ion battery separator with a thermal shutdown function to prevent thermal runaway. The separator is fabricated through dip-coating and thermally induced phase separation, and exhibits improved ionic conductivity and discharge capacity compared to commercial polyolefin separators. The EVA/PEEK/EVA separator ensures the safety of LIBs without sacrificing electrochemical performance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Chemistry, Physical
Zongle Huang, Wenting Sun, Zhipeng Sun, Rui Ding, Xuebin Wang
Summary: With the increasing demand for electrochemical energy storage, commercial lithium-ion and metal battery systems have been developed. The separator, an essential component of batteries, plays a crucial role in determining their electrochemical performance. However, conventional polymer separators have limitations that hinder the development of electric vehicle power batteries. Advanced graphene-based materials have emerged as a solution to these challenges. Incorporating advanced graphene-based materials into the separator of batteries can overcome these issues and enhance their capacity, stability, and safety. This review provides an overview of the preparation and applications of graphene-based materials in different types of batteries, and outlines future research directions in this field.
Article
Electrochemistry
Lei Ding, Ning Yan, Sihang Zhang, Ruizhang Xu, Tong Wu, Feng Yang, Ya Cao, Ming Xiang
Summary: Polyethylene/poly (vinyl alcohol) (PE/PVA) composite separators prepared by a dipping process demonstrate superior electrolyte affinity and compression resistance, leading to improved cycle stability and C-rate performance of lithium-ion batteries.
ELECTROCHIMICA ACTA
(2022)
Review
Chemistry, Applied
Yuanyuan Xia, Xinping Li, Jingshun Zhuang, Wenliang Wang, Syed Comail Abbas, Chenglong Fu, Hui Zhang, Ting Chen, Yue Yuan, Xingjin Zhao, Yonghao Ni
Summary: This review thoroughly examines the current research status of cellulose-based materials for lithium-ion batteries (LIBs) components, with a specific focus on the impact of functional groups in cellulose-based separators. The study reveals that certain functional groups play a crucial role in improving the mechanical, thermal, and electrical properties of the separators. It highlights the importance of understanding the influence of functional groups in cellulose-based materials on LIBs performance.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Chen Cheng, Rendang Yang, Yang Wang, Danning Fu, Jie Sheng, Xiaohui Guo
Summary: In this study, chitosan (CS) was grafted onto cellulose surface to form chitosan-modified cellulose (OBCS) for lithium-ion battery separators. The OBCS separators demonstrated excellent pore structure and tunable pore size, and exhibited higher electrochemical performance than commercial polypropylene (PP) separators. This work provides a feasible strategy for improving the pore structure and porosity of nanocellulose separators.
CARBOHYDRATE POLYMERS
(2023)
Article
Energy & Fuels
Runjie Yang, Guoqing Yu, Zegang Wu, Tingting Lu, Tao Hu, Fengqin Liu, Hongliang Zhao
Summary: This study examines the performance of aged aluminum oxide ceramic-coated polyethylene separators (PE-Al2O3 separators) used in lithium-ion batteries. The cycling process of the batteries leads to the accumulation of degradation products on the separator surface, resulting in decreased porosity, ionic conductivity, and increased internal resistance. The mechanical properties of the separator deteriorate with higher current rates and the number of cycles. After 200 cycles at 1.5C, the tensile strength of the aged separator decreases by approximately 6.70%. The aging process also causes a decrease in wettability and an increase in the contact angle with the electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Yukang Xiao, Ang Fu, Yue Zou, Lin Huang, Huiqun Wang, Yisong Su, Jianming Zheng
Summary: This study proposes a HDPE wax@boehmite/PE composite separator to improve the safety and cycling performance of LIBs by blocking lithium-ion transportation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Mohammad Hadi Moghim, Ashkan Nahvi Bayani, Rahim Eqra
POLYMER INTERNATIONAL
(2020)
Article
Polymer Science
Mohammad Hadi Moghim, Seyed Mojtaba Zebarjad, Rahim Eqra
Summary: In this study, Fe3O4 ceramic nanoparticles were deposited on the carbon nanotubes surface, and the effect of these ceramic nanoparticles on the magnetic shape memory behavior of polyurethane-carbon nanotube nanocomposites was investigated. A new model for the shape memory behavior of this composite was obtained. The results showed excellent performance in recovery stress and saturation magnetization for the nanocomposite material.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Engineering, Chemical
Solmaz Parsaei, Seyed Mojtaba Zebarjad, Mohammad Hadi Moghim
Summary: PI/PVDF-HFP/PI sandwich separators were prepared by electrospinning, pressing, and heat treatment, resulting in improved properties such as air permeability, porosity, and tensile strength. The use of polyimide as the sandwich improved flame retardant properties, while the PVDF-HFP intermediate layer ensured battery safety. Experimental results showed that the sandwich separator had higher discharge capacity.
POLYMER ENGINEERING AND SCIENCE
(2022)