Article
Chemistry, Physical
Yang Zhang, Can Cui, Jie Liu, Yiying Bei, Yingying Li, Zheng Song, Yaxin Feng, Heng Xu, Suhuan Tian, Ye Song, Fengsheng Li
Summary: This study introduces a strategy of co-modification with Nb doping and LiBO2 coating to improve the electrochemical performance of LiNixCoyMn1-x-yO2 (NCM) materials. Experimental results demonstrate that this co-modification method can effectively stabilize the internal structure, reduce cation mixing, and improve the cycling stability of the materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yin Li, Li Wang, Keyu Zhang, Feng Liang, Meimei Yuan, Hui Zhang, Yaochun Yao
Summary: In this study, nano-sized LiFePO4 was prepared using phytic acid as a novel phosphorus source to improve electrochemical performance. Doping phosphorus effectively enhanced carbon graphitization, increasing electrical conductivity and lithium ion mobility. The resulting phosphorus-doped composite demonstrated high capacity and superb cycle stability, outperforming the pristine LFP/C.
Article
Chemistry, Physical
Yin Li, Li Wang, Feng Liang, Yaochun Yao, Keyu Zhang
Summary: This study successfully improved the electronic conductivity and lithium ion mobility of LiFePO4 through boron doping at the P-site, enhancing its electrochemical performance. The LiFeP0.98B0.02O4-delta/C exhibited the best performance, delivering a first discharge capacity of 138 mAh g(-1) at 2C with no evident capacity fading after 300 cycles. However, excessive doping of boron could lead to oxygen defects in the material, resulting in unfavorable electrochemical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Biaobing Chen, Min Liu, Shuang Cao, Gairong Chen, Xiaowei Guo, Xianyou Wang
Summary: This paper presents a new method for recovering FePO4 and Li2CO3 from spent LiFePO4 cathode materials to address the shortage of lithium resources. It was found that a sample with 12% carbon content in the LiFePO4 composite demonstrated better electrochemical performance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Environmental
Guangchang Yang, Kai Pan, Feiyan Lai, Zhongmin Wang, Youqi Chu, Shenglong Yang, Jinlu Han, Hongqiang Wang, Xiaohui Zhang, Qingyu Li
Summary: Ni-rich layered metal oxide of LiNi0.6Co0.2Mn0.2O2 (NCM) is a promising cathode material for next-generation lithium-ion batteries, however, its large-scale commercial applications are hindered by capacity fading and side reactions. Through a combined modification strategy of coating and doping, the overall structure stability is strengthened, resulting in an excellent cycling performance and superior rate capability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Shuaiwei Liu, Yunjiao Li, Shilei Wang, Yongxiang Chen, Zhouliang Tan, Jiachao Yang, Shiyi Deng, Zhenjiang He
Summary: In this study, a viable and effective approach to fabricate yttrium modified LiNi0.8Co0.15Al0.05O2 (NCA) cathode materials with higher electrochemical performance has been reported. The yttrium modified materials exhibit notably enhanced electrochemical performance, with potential application in the cathode materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Physical
Qingke Huang, Zhihua Hu, Kai Chen, Zeng Zeng, Yan Sun, Qingquan Kong, Wei Feng, Ke Wang, Zhuangzhi Li, Zhenguo Wu, Ting Chen, Xiaodong Guo
Summary: Sodium-ion batteries (SIBs) are considered as a promising alternative to lithium-ion batteries (LIBs) due to their abundant resources. Na3V2(PO4)3 (NVP) is a promising cathode material for SIBs, thanks to its unique structure, good stability, and fast sodium diffusion kinetics. However, its weak intrinsic conductivity hinders its further market application. Various strategies, such as foreign ion doping and carbon coating, have been proposed to solve this issue.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Xiong Song, Guoxue Liu, Haifeng Yue, Liang Luo, Shunyi Yang, Youyuan Huang, Chunru Wang
Summary: By utilizing a two-step modification involving zirconium doping and LiBO2 coating, a novel quaternary low-cobalt LiNi0.88Co0.06Mn0.03Al0.03O2 cathode material (NCMA-ZB) was designed and synthesized, showing significantly improved long-term cycling performance, voltage fading, high-temperature performance, and safety performance. The modified cathode also demonstrated enhanced structural stability during cell cycling, with an increased thermal decomposition temperature by 8 degrees Celsius. The coin cells assembled with the NCMA-ZB cathodes exhibited excellent discharge specific capacity and capacity retention after cycling, showing promising potential for use in high-performance lithium ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Electrochemistry
Zishan Ahsan, Bo Ding, Zhenfei Cai, Cuie Wen, Weidong Yang, Yangzhou Ma, Shihong Zhang, Guangsheng Song, Muhammad Sufyan Javed
Summary: LiFePO4 is a promising cathode material with environmental friendliness, high cycling performance, and safety. Enhancing electrical conductivity and lithium ion diffusion through strategies such as surface modification and particle size reduction can improve electrochemical performance. Cathode prelithiation additives have been shown to effectively improve initial capacity for full cell application.
JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE
(2021)
Review
Chemistry, Physical
Hangyu Lu, Ruilin Hou, Shiyong Chu, Haoshen Zhou, Shaohua Guo
Summary: This article reviews the potential and challenges of layered lithium-rich oxide materials in improving the energy density of lithium-ion batteries. It introduces the composition, structure, electrochemical mechanism, and internal factors affecting the performance of these materials, and discusses recent material modification strategies. The article summarizes different modification methods and prospects for the design of high-capacity, long-cycle layered lithium-rich materials and high-energy lithium-ion batteries.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
Chemistry, Physical
Qiulin Chen, Hailang Liu, Junxian Hu, Li Wang, Yin Li, Yaochun Yao
Summary: In recent years, LiFePO4 has gained attention as an excellent cathode material for lithium-ion batteries, but its low conductivity poses a major disadvantage. A nitrogen-doped carbon coating on LiFePO4 is found to be an effective solution to this drawback. This study presents a novel method for fabricating nitrogen-doped carbon-coated LiFePO4 using sucrose and tripolycyanamide as carbon and nitrogen sources, respectively. The nitrogen-doped carbon layer on LiFePO4 forms a core-shell conductive network, promoting electron migration and enhancing electrochemical performances. The LFP/C-N-1.25 with 1.25 wt% N modification exhibits high specific capacities, better rate performance, and favorable lithium ion diffusion coefficient, suggesting its potential as a cathode material for lithium-ion batteries.
Article
Chemistry, Physical
Xiaoling Cui, Kuanyou Tuo, Hong Dong, Xiaolan Fu, Shimin Wang, Ningshuang Zhang, Liping Mao, Shiyou Li
Summary: The modification of phosphorus-doped carbon coating on LFMP improves electronic conductivity and ion transmission, forming a three-dimensional conductive channel and maintaining excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Guangchang Yang, Kai Pan, Zhixiong Yan, Shenglong Yang, Fan Peng, Jingyao Liang, Feiyan Lai, Hongqiang Wang, Xiaohui Zhang, Qingyu Li
Summary: Surface coating is an effective strategy to improve cycling stability of lithium-ion battery electrodes. In this study, a complete coating layer of Mg3B2O6 was prepared on the surface of NCM811 cathode material using a non-traditional route. The coating layer protected the surface crystal structure of the electrode and enhanced the battery's rate capability and cycling performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Wenqin Ling, Zhengguang Zou, Shuchao Zhang, Xiaoxiao Peng, Shiying Luo, Xin Tang, Jing Geng
Summary: Heteroatom doping is a common modification method for lithium-ion battery electrodes, and it can improve the electrochemical performance of materials. In this study, CO2-modified VO2(B) nanorods were synthesized, resulting in a CO2-VO2 electrode with high rate capacity and capacity retention. The role of CO2 small molecules as a pillar in the interlayer of VO2(B) and the weak electrostatic attraction between OCO2 and Li+ contribute to the stability and diffusion of lithium ions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Nitheesha Shaji, Feng Jiang, Jae Yoon Sung, Murugan Nanthagopal, Taehyung Kim, Byeong Jin Jeong, Soon Phil Jung, Chang Woo Lee
Summary: This study focuses on surface modification of LiFePO4 (LFP) cathode material for lithium-ion batteries (LIBs) using heteroatoms-doped carbon. The results demonstrate that the nitrogen and sulfur dual-doped carbon coating layer enhances the electrochemical activity, cycling stability, and rate capability of the NSC@LFP cathode.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.