Article
Chemistry, Physical
Renato Goncalves, Poonam Sharma, Pura Ram, Stanislav Ferdov, M. Manuela Silva, Carlos M. Costa, Rahul Singhal, Rakesh K. Sharma, Senentxu Lanceros-Mendez
Summary: LiMn2O4 and LiMn1.5M0.5O4 (M: Ni, Cu, Co) doped particles were synthesized by sol-gel, resulting in improved cycling behavior and thermal stability. Doping elements reduced pore size and enhanced thermal stability of LiMn2O4. Different active materials for cathodes showed varied electrochemical performances, with Ni, Cu, and Co doped LiMn2O4 demonstrating improved performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yu Huang, Kai Wu, Ronghui Hao, Wenkang Miao, Yueling Cai, Peng Wang, Jipeng Cheng, Zihan Wang, Qianqian Li, Bingkun Guo, Anmin Nie
Summary: Li2MnO3, as a traditional member of lithium-rich layered cathodes, shows large specific capacity, but suffers from capacity fading and voltage decay. Iridium doping improves electrochemical performance, with dopant concentration and calcination temperature affecting the performance due to intrinsic microstructure and crystallization. The mechanism of improvement lies in the structure stability induced by iridium doping in TM sites, enhancing high-capacity cathode materials for lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xudong Liu, Xinling Wang, Zhibin Ye
Summary: In this study, the effects of substituting functional groups and molecular conjugate structures on the electrochemical properties of nitroaromatic derivatives as organic cathodes for rechargeable lithium-ion batteries were investigated. It was found that the redox potential of nitroaromatic cathodes can be adjusted by introducing different electronically inducible functional groups, and the cyclic life can be prolonged by introducing hydrophilic groups. Additionally, the electronic conductivity and electrochemical kinetics of nitroaromatics can be increased significantly with the introduction of extended p-conjugated structures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Panawan Vanaphuti, Laisuo Su, Arumugam Manthiram
Summary: This study investigates the impact of electrochemical pre-lithiation on layered oxide cathodes LiNiO2 and LiCoO2 in anode-free lithium-metal batteries (AFLMBs). The research finds that LiCoO2 shows better cycle performance than LiNiO2 under an optimal amount of excess Li, and proposes a promising approach for developing tailor-made layered oxide cathodes for AFLMBs.
Article
Chemistry, Multidisciplinary
Buddha Deka Boruah, Bo Wen, Michael De Volder
Summary: A novel photorechargeable lithium-ion battery has been proposed, which can be charged using light. This battery utilizes photocathodes made from vanadium pentoxide nanofibers mixed with P3HT and rGO additives, leading to significant improvements in capacity and conversion efficiency.
Article
Chemistry, Physical
Axiang Li, Zhuolin Rong, Bing Yuan, Fangyi Cheng, Wangqing Zhang
Summary: We synthesized crosslinked polyimides by condensation polymerization between 3,4,9,10-perylenetetracarboxylic dianhydride and 1,2-ethanediamine in the presence of a trifunctional crosslinker of diethylenetriamine. The crosslinked polyimides exhibited a porous structure with a high surface area. When used as cathode materials in lithium metal half-cells, the crosslinked polyimides showed a high discharge capacity of 160.3 mA h g-1 at a current density of 30 mA g-1, and the assembled lithium-ion batteries retained 77% capacity after 2000 cycles at a current density of 150 mA g-1, surpassing the performance of batteries with linear polyimides.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Juho Valikangas, Petteri Laine, Tao Hu, Pekka Tynjala, Marcin Selent, Palanivel Molaiyan, Kahr Juergen, Ulla Lassi
Summary: This study explores the effects of further processing on the electrochemical performance of the LiNi0.975Al0.025O2 cathode material. Washing the material surface forms a nonconductive nickel oxide phase, reducing initial capacity and enhancing cycle properties. The secondary heat treatment re-lithiates the surface nickel oxide back to the cathode material, increasing initial capacity and cycle properties. Avoiding long-term high voltage charging significantly improves the cycle life.
Article
Chemistry, Physical
Yiyuan Ding, Dong Chen, Xin Ren, Yuliang Cao, Fei Xu
Summary: In this study, three polyanthraquinonylimides (PAQIs) were synthesized and investigated as organic cathodes for rechargeable Mg batteries (RMBs), demonstrating high capacity, good cycling stability, and high rate capability. The study also revealed that the PAQIs stored Mg2+ through carbonyl enolization and exhibited high specific power density.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Kai Zhang, Yuan Xie, Michael J. Monteiro, Zhongfan Jia
Summary: Researchers have synthesized redox-active organic compounds with very low solubility nitroxide radicals, which show potential for application in solid-state energy storage. These new structures demonstrate the importance of lower solubility and the ability to maintain good properties even at high content, while preventing shuttle effects.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Huangkai Zhou, Jun Izumi, Sho Asano, Kotaro Ito, Kenta Watanabe, Kota Suzuki, Fumiya Nemoto, Norifumi L. Yamada, Kohei Aso, Yoshifumi Oshima, Ryoji Kanno, Masaaki Hirayama
Summary: This study investigates the effect of oxide modification on the fast lithium intercalation on cathode surfaces using in situ neutron reflectometry. The results show that the modified cathode exhibits superior rate capability due to the formation of a dense cathode-electrolyte interphase (CEI). The fast desolvation of lithium on the CEI contributes to the high rate capability of surface-modified cathodes.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Pallavi Thakur, Khorsed Alam, Prasenjit Sen, Tharangattu N. Narayanan
Summary: By incorporating -OH functionalities into the cathode through polysaccharide addition, the discharge capacity and cyclability of Li-O2 batteries are enhanced. This rational design route provides high capacities for the emergent Li-O2 batteries.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jayse Langdon, Arumugam Manthiram
Summary: The crossover of transition-metal ions has minimal effect on the lithium-metal anode in batteries with high-nickel layered-oxide cathodes, but the soluble decomposition products from the anode adversely impact the cathode, accelerating impedance growth and capacity fade. This study highlights the importance of improved battery design for lithium-metal anodes to address these crossover effects.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Physical
Mingyue Wang, Zhongchao Bai, Ting Yang, Chuanhao Nie, Xun Xu, Yunxiao Wang, Jian Yang, Shixue Dou, Nana Wang
Summary: Lithium-sulfur batteries have great potential for energy storage systems due to their high theoretical energy density and abundance of sulfur. However, the low actual energy density remains a challenge for their practical applications. This review highlights recent progress in increasing the sulfur loading of Li-S batteries and discusses key materials such as sulfur hosts and separators.
ADVANCED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Chaeeun Song, Hyeongyu Moon, Kyungeun Baek, Chorong Shin, Kwansoo Lee, Seok Ju Kang, Nam-Soon Choi
Summary: Nickel-rich layered oxides have high potential as cathode materials for high-energy Li-ion batteries, but practical applications are hindered by issues such as metal dissolution and reactive compound formation. This study demonstrates that the supplementation of electrolyte with tert-butyldimethylsilyl glycidyl ether (tBS-GE) can inhibit the interfacial degradation of LiNi0.9CoxMnyAlzO2 (NCMA) cathode and graphite (Gr) anode caused by HF. The tBS-GE scavenges HF and stabilizes the electrode surfaces, while its reaction with CO2 suppresses battery swelling. Adding 0.1 wt% tBS-GE to the electrolyte leads to improved capacity retention and discharge capacity of the NCMA/Gr full cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Benjamin B. Peterson, Evan M. Andrews, Francisco Hung, John C. Flake
Summary: Secondary lithium-bromine (Li-Br-2) batteries with carbonized metal-organic frameworks (MOFs) show improved capacities and retention rates, with ZIF-8 derived electrodes exhibiting higher specific capacities and retention over cycles. The enhanced performance is attributed to higher LiBr loadings, improved bromine trapping and adsorption, and the microporous structure with heteroatom bonding in ZIF-8 derived carbon electrodes.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Dewei Wang, Shuangyu Wang, Zeming Lu
Summary: The use of potassium thioacetate activation technique to produce S-doped 3D porous carbons (S-3DPCs) for ZHSCs cathodes shows excellent electrochemical performance, with a large specific surface area and a certain amount of sulfur, indicating significant potential for applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Dewei Wang, Guoxian Chen, Zhongmou Pan
Summary: A versatile one-step magnesiothermic reduction and self-activation process was developed for the synthesis of highly-curved carbon nanosheets (HCCNs) with hierarchical pore structures, which provide abundant active sites and efficient ions diffusion kinetics. The resulting HCCNs exhibit excellent charge storage performance with an impressive reversible capacity, excellent rate capability, and good cyclic stability, making them promising for electrochemical energy storage applications.
Article
Electrochemistry
Dewei Wang, Zhongmou Pan, Guoxian Chen, Zeming Lu
Summary: This study demonstrates an efficient zinc acetate-assisted pyrolysis strategy to transform glycerol into mesopore-enriched hierarchically carbon nanosheets. By optimizing the amount of zinc acetate, carbon materials with large specific surface area and ultra-high mesopore content were obtained, showing promising results for electrochemical energy storage applications.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Shuangyu Wang, Zhiwei Hu, Zhongmou Pan, Dewei Wang
Summary: The construction of heteroatom-doped hierarchical carbon frameworks with large specific surface area using Mohr's salt-assisted KOH activation strategy has been developed. The S-doped hierarchical carbon frameworks exhibit high specific capacitance and excellent rate capability as electrodes for supercapacitors. Moreover, the supercapacitor device shows a high energy density of up to 66.26 Wh kg(-1) in ionic liquid electrolyte, indicating the potential of converting renewable biomass into value-add porous carbon for electrochemical energy-storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Guoxian Chen, Zhiwei Hu, Jie Zhang, Huiqiang Su, Dewei Wang
Summary: A facile and tunable template route has been developed for the synthesis of N-doped hollow carbon nanoboxes, which exhibit large specific surface area, well-developed micropores, and high heteroatom contents. These N-HCNbs show promising performance as cathodes in Zn-ion hybrid supercapacitors, delivering a high specific capacity, excellent rate performance, and ultralong cycling life. This work offers an efficient protocol for heteroatom doped hollow nanocarbons for electrochemical energy storage application.
Article
Chemistry, Physical
Shuangyu Wang, Jinde Li, Yihu Ke, Yelin Wei, Dewei Wang
Summary: This study successfully prepared N/S co-doped 3D porous carbon material and demonstrated its potential applications in electrochemical energy storage. The material possesses a large specific surface area, hierarchical porosity, and high specific capacitance, leading to high energy density and satisfactory rate capability in different electrolyte systems.
Article
Electrochemistry
Dewei Wang, Zhao Zhang, Jiaqi Sun, Zeming Lu
Summary: N, B dual-doped carbon nanosheets with high heteroatoms content were prepared by pyrolysis method. The resulting samples showed high pseudo-capacitance, leading to enhanced charge storage capability in aqueous ZIC devices.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Dewei Wang, Shuangyu Wang, Jiaqi Sun
Summary: This study investigates a non-corrosive chemical activation agent, potassium peroxodisulfate, for synthesizing high-performance carbon nanosheets by utilizing its temperature-dependent decomposition behavior. The N, S co-doped carbon nanosheets show excellent electrochemical properties with large specific surface area and optimal functional groups, demonstrating potential for designing high-performance energy storage devices.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Analytical
Dewei Wang, Zhaorui Sun, Xinliang Han
Summary: This article introduces a method for synthesizing porous carbon nanosheets using a eutectic salt induced self-activation process, which allows for controlled microstructures and large specific surface area. The experimental results show that these nanosheets exhibit excellent performance in zinc-ion hybrid supercapacitors.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Guoxian Chen, Zhiwei Hu, Huiqiang Su, Jie Zhang, Dewei Wang
Summary: A versatile coordination chemistry strategy has been developed to produce B, N co-doped carbon nanosheets with an ultrahigh doping level. The as-obtained nanosheets exhibit a high specific capacity and good stability when used as the cathode for aqueous Zn-ion hybrid capacitors. Detailed changes of the N and B containing functional groups during the charge-discharge process have been evaluated, providing new insights into the roles of heteroatoms containing functional groups for electrochemical energy storage applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Dewei Wang, Jiaqi Sun, Long Chen
Summary: Exploration of high-performance aqueous ammonium-ions hybrid supercapacitor has attracted significant research attention. Structural reconstructed cobalt-iron layered double hydroxides (SR-CoFe LDHs) with abundant structural defects are reported as a high-capacity cathode for NH4 (+) storage. The research provides insights into the design of high-capacity cathode for aqueous NH4 (+) storage and also demonstrates the construction of aqueous hybrid devices with NH4 (+) as the charge carrier.
Article
Chemistry, Physical
Jiaqi Sun, Hailong Ma, Dewei Wang
Summary: Researchers have successfully synthesized four types of porous carbon materials by simply changing the additives, using ZIF-8 as the precursor. These carbon materials can serve as hosts for iodine in zinc-iodine aqueous batteries, exhibiting excellent structure-electrochemical performance relationship. The weak van der Waals force between the carbon hosts and iodine species can be transformed into strong chemical interaction through halogen bonds, resulting in improved specific capacity, rate capability, and cycle life. This study provides possibilities for designing high-performance aqueous zinc-based batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Dewei Wang, Zhaorui Sun, Xinliang Han
Summary: In this study, a bidirectional chemical activation strategy is proposed to synthesize foam-like porous carbon nanosheets and oxygen-deficient a-MnO2 nanorods. Both materials demonstrate excellent electrochemical performance in (NH4)2SO4 electrolyte and show great potential for assembling ammonium-ion hybrid supercapacitor (A-HSC).
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Energy & Fuels
Zhaorui Sun, Xinliang Han, Dewei Wang
Summary: From the cost and safety perspective, aqueous rechargeable zinc-ion based electrochemical energy storage devices can replace lithium-ion batteries. The development of zinc-iodine battery-capacitor hybrid devices integrated with zinc-iodine batteries and zinc-ion hybrid capacitors is desired to combine the energy density of ZIBs and the high-power density of ZICs. The study presents a 3D-2D hybrid structure of N-doped porous carbon framework decorated with nanosheets as a stable iodine host, which exhibits battery-level specific capacity and energy density, as well as supercapacitor-level rate capability and cycle stability.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Dewei Wang, Jiaqi Sun, Long Chen
Summary: Exploration of high-performance aqueous ammonium-ions hybrid supercapacitor has garnered significant attention. The study reports on the use of structural-reconstructed cobalt-iron layered double hydroxides (SR-CoFe LDHs) with abundant structure defects as a high-capacity cathode for NH4+ storage. The resulting SR-CoFe LDHs exhibit excellent performance for NH4+ storage due to lower NH4+ adsorption energy and enhanced electrical conductivity. Furthermore, an ammonium-ion hybrid supercapacitor assembled with SR-CoFe LDHs and hierarchical carbon demonstrates high specific capacitance, long cycle stability, and high energy density. Overall, this work provides insights into the design of high-capacity cathodes for aqueous NH4+ storage and the construction of aqueous hybrid devices with NH4+ as the charge carrier.
