Article
Chemistry, Physical
Wei Zhong, Siwu Li, Mengchuang Liu, Ziqi Zeng, Shijie Cheng, Jia Xie
Summary: The self-sacrificing Li2C2O4 is a promising lithium replenisher with high specific capacity, residue-free and low-cost properties. However, its low electrochemical activity poses a challenge for the compatibility of electrolyte and cathode materials. In this study, a three-dimensional hierarchical spherical Mo2C/N-doped graphene co-catalyst is synthesized to enhance the reactivity of Li2C2O4 and accelerate the electron-ion transport.
Article
Chemistry, Physical
Minseok Lee, Minji Jeong, Youn Shin Nam, Janghyuk Moon, Minah Lee, Hee-Dae Lim, Dongjin Byun, Taeeun Yim, Si Hyoung Oh
Summary: In this study, nitrogen-doped mesoporous carbon (NdMC) materials were proposed as catalytic hosts to enhance the fragmentation of polysulfides and improve electron access to the redox active sites in Mg-S batteries. By fine-tuning the structural properties of the carbon hosts, the composite electrode exhibited an increased reversible capacity and good cycling capacity retention.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
S. P. Qin, Y. Wang, Y. C. Li, W. W. Zhang, B. Yao, X. Y. Zhang
Summary: In this study, a SrCoO3 perovskite catalyst modified by loading graphene and doping Mn was prepared by sol-gel method. The effects of 20% graphene loading and 50% Mn doping on the performance of SrCoO3 perovskite as a cathode catalyst for Al-air battery were investigated. The results showed that 50% Mn-doped SrCo0.5Mn0.5O3 effectively improved the catalytic performance of oxygen reduction reaction (ORR). The catalyst containing the graphene-loaded SrCo0.5Mn0.5O3 perovskite exhibited outstanding electrocatalytic ORR activity and is suitable for use as cathode catalyst in Al-air battery.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Dong In Jeong, Hyung Wook Choi, Seongwon Woo, Jung Hyeon Yoo, Mohit Kumar, Young Hyun Song, Byungkwon Lim, Bon Keup Koo, Bong Kyun Kang, Dae Ho Yoon
Summary: The study synthesized a new hybrid material, CoFe@N-C/MNGF, as a bi-functional electrocatalyst to replace noble-metal catalysts, demonstrating excellent performance in oxygen reduction and oxygen evolution reactions, providing a potentially cost-efficient alternative to traditional catalysts.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yanan Zhu, Yuanfu Deng, Guohua Chen
Summary: In this study, heteroatom-doped carbon nanosheets were successfully synthesized using crosslinked triazine frameworks and g-C3N4 nanosheets as a template. The nanosheets exhibited high crinkling and interconnectivity, along with a large surface area (1060 m(2) g(-1)) and pore volume (2.14 cm(3) g(-1)), with highly dispersed N, O and S. When coated on commercial Celgard separators, the modified batteries showed low self-discharge and improved rate performance, even at 4 C. Excellent cycling performances were achieved at different rates, with an initial discharge capacity of 1240 mA h g(-1) and a capacity decay of only 0.059% per cycle for over 1000 cycles at 0.5 C.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Environmental
Lingqin Fan, Yu Zheng, Jianfeng Li, Zhiping Du, Jing Ren, Huifang Sun, Huazhang Zhao, Fangqin Cheng
Summary: This study successfully modulated the structure of nitrogen-doped graphene (N-rGO) by introducing SiO2 nanoparticles, forming an interlayer-expanded mesoporous SiO2@N-rGO. The degradation efficiencies of phenol and humic acid (HA) were significantly increased by 150% and 240% respectively, attributed to the synergistic effect of electron-enriched nitrogen sites and interlayer-expanded mesoporous structure.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Jungjin Park, Joonhee Moon, Vitalii Ri, Sangheon Lee, Chunjoong Kim, Elton J. Cairns
Summary: Nitrogen-doped graphene quantum dots as a sulfur-affinitive additive show promising potential in improving the performance of Li-S cells, achieving high cycle retention and capacity retention. Experimental results demonstrate that Li-S cells decorated with nitrogen-doped graphene quantum dots exhibit excellent performance indicators, indicating their potential application prospects.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Meng-Xin Ren, Cun-Jian He, Ya-Jing Duan, Yu-Qian Wang, Wen-Jie Meng, Yun-Lei Hou, Dong-Lin Zhao
Summary: The combination of nitrogen-doped carbon shell or graphene with mesoporous structure significantly enhances the electrochemical properties of the composite materials. The synthesis of mesoporous silicon nanocubes coated by nitrogen-doped carbon shell or wrapped by graphene addresses the challenges of large volumetric expansion and poor electrical conductivity, resulting in improved stability and specific capacities of the electrode materials.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Anran Liu, Suhua Yu, Xiaojun Lu, Songqin Liu
Summary: Through hydrothermal assembly and high-temperature carbonization, we designed a novel NiCo2O4@nitrogendoped carbon nanotube@3D graphene (NCO@CT@3DG) aerogel to overcome the issues of large volume expansion and poor electrical conductivity in redox-based electrode materials. The NCO@CT@3DG aerogel exhibited excellent electrochemical properties as an anode material for lithium-ion batteries, with high capacity, superior cycle and rate performance. The outstanding properties are attributed to the synergistic effect of each component and the unique graphene aerogel hybrid structure. This study demonstrates the great potential of 3DG aerogel hybrid structure in improving electrochemical properties of active materials with high volume expansion and poor conductivity.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mansoureh Nematzadeh, Mahya Nangir, Abouzar Massoudi, Xiaobo Ji, Ali Khanlarkhani, Jozsef Toth
Summary: This study investigates the electrochemical performance of nitrogen-doped graphene/silicene composite. The results suggest that nitrogen doping can enhance the performance of silicene as an anode for lithium-ion batteries. The pyrrolic and graphitic sites in the composite play different roles in facilitating the diffusion and kinetics of Li+ ions.
Article
Materials Science, Multidisciplinary
Chunlin Teng, Chuanqi Zhang, Keshu Yin, Mengxiao Zhao, Yeshuang Du, Qi Wu, Xihong Lu
Summary: N-Fe2O3-x is a promising new cathode material for RAZBs with high capacity and excellent energy density, prepared through a unique method to achieve outstanding electrochemical performance.
SCIENCE CHINA-MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoling Mou, Jiaxin Ma, Shuanghao Zheng, Xingkun Chen, Frank Krumeich, Roland Hauert, Ronghe Lin, Zhong-Shuai Wu, Yunjie Ding
Summary: The study demonstrates a method to prepare highly nitrogen-doped carbon materials by intensifying ring opening of cross-linked polymers through controlled pre-oxidation followed by conventional pyrolysis, leading to a two- to threefold increase in nitrogen content with great tunability. These carbon materials exhibit excellent performance in lithium ion batteries and catalytic reactions.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Zhe Zhang, Lei Jiang, Daoning Wu, Fenghao Liang, Xiaochun Li, Yichuan Rui, Bohejin Tang
Summary: The study successfully enhanced the cycling stability and rate performance of SnS2 by upgrading a novel nitrogen-doped strategy, which improved the mechanical capability and electrical conductivity of the material through nitrogen doping, showing promising prospects for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Yuan Yao, Caiyun Chang, Rongrong Li, Di Guo, Zhixiao Liu, Xiong Pu, Junyi Zhai
Summary: This research proposes a multifunctional sulfur host, cobalt-doped stannic oxide uniformly grown on carbon nanotubes (Co-SnO2@CNT), to regulate its electronic structure and improve the catalytic activity for polysulfide conversion, resulting in enhanced performance of lithium-sulfur batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xia Zeng, Jing Chen, Lin Ma, Chen Chen, Yuan Yuan, Lusheng Liao, Ziyun Peng, Liyi Zheng, Yilin Huang, Jie Peng, Guixun Yang, Yanjie Xi
Summary: A heterostructured composite of Cr2S3 nanosheets embedded into N-doped porous carbon skeleton (Cr2S3/NC) has been synthesized, which effectively addresses issues such as particle aggregation, volume expansion, and low conductivity. The composite exhibits superior Li-storage performance due to the confinement of Cr2S3 nanosheets by the conductive carbon matrix and the presence of a porous conductive carbon framework.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Baixue Ouyang, Tao Chen, Xinxin Chen, Xiaowen Fan, Jue Wang, Weifang Liu, Zhouguang Lu, Kaiyu Liu
Summary: To improve the energy and power density of P2-type layered cathode materials in sodium ion batteries, stimulating oxygen-related activity is a promising strategy. In this study, a low-cost Co/Ni free layered P2-type Na0.67Mn0.6Cu0.3Mg0.1O2 cathode was designed to construct reversible anion reduction. Na0.67Mn0.6Cu0.3Mg0.1O2 exhibited an obvious anion reduction electrochemical behavior, showing the potential of oxygen as a capacity compensation process. The designed cathode material showed excellent cyclic stability and high capacity retention, providing new insights for the development of stable cathode materials in sodium ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yan Hou, Qiong Liu, Lin Yang, Jing Hu, Zhenyu Wang, Xinmiao Zhang, Jialiang Pan, Zhengyu Bai, Haijiang Wang, Zhouguang Lu
Summary: In this study, SiO4 was introduced to substitute PO4 in order to modulate the local environment of Mn, activating the redox activity and stabilizing the reversibility of NMCP-Si. The introduction of SiO4 resulted in enhanced rate capability and cycling stability of the electrode material. This work addresses the challenge of stabilizing the structure of Mn-based NASICONs and provides a breakthrough in understanding how to improve Na+ conductivity by regulating local structure.
Article
Chemistry, Multidisciplinary
Farong Zhang, Hongyu Xia, Tongye Wei, Bei Liu, Huaming Li, Zhouguang Lu, Mei Yang
Summary: In this study, a novel aqueous and conductive binder (OXP/CNT-1.5) composed of carbon nanotubes (CNTs) interwoven with a flexible nano-film of oxidized pullulan (OXP) is designed. The binder exhibits high flexibility, rapid ion transport, and excellent mechanical integrity, thanks to the rotatable methylene ether bridge units within the OXP chain. The binder also forms continuously conductive and flexible skeletons with CNTs, ensuring high conductivity and stability of the electrodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yunfei Bai, Zhen Wang, Ning Qin, Detian Ma, Wenbin Fu, Zhouguang Lu, Xiaobo Pan
Summary: Organic materials have great potential for future rechargeable batteries due to their abundant natural resources and fast redox reactions. A nondestructive electron paramagnetic resonance (EPR) technique is used to detect the electron migration process within the polyimide cathode in real-time, allowing for the understanding of the fundamental redox mechanism of lithium-ion batteries (LIBs) to be revealed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Hongzhi Wang, Ning Qin, Yingzhi Li, Zhiqiang Li, Fangchang Zhang, Wen Luo, Chun Zeng, Zhouguang Lu, Hua Cheng
Summary: Graphite anodes for lithium-ion batteries suffer from a limited cycling life and poor rate capability due to an unstable solid electrolyte interphase (SEI). This study proposes a simple and viable method using Nafion as an additive in the binder to construct a superior interfacial film, which mitigates the continuous decomposition of the electrolyte solvent molecules on the graphite surface. The resulting graphite anodes exhibit a long cycling life with a capacity retention rate of 73.85% after 350 cycles and a high rate capability of 333.4 mAh g? 1 at 1C and 327.6 mAh g? 1 at 6C.
Article
Biodiversity Conservation
Chen Chen, Wenya Xiao, Han Y. H. Chen
Summary: Soil pH plays a critical role in regulating soil nutrients and impacting biodiversity and ecosystem functions in terrestrial ecosystems. This study conducted a global meta-analysis and found that soil acidification increases with nitrogen (N) deposition, particularly in neutral-pH soils. Grassland soils are most strongly affected by high N addition, while wetland soils are least acidified. The study also revealed that atmospheric N deposition has led to a global average soil pH decline of -0.16 in the past 40 years, with certain regions being hotspots of soil acidification. These findings emphasize the significant threat that anthropogenic N deposition poses to global terrestrial biodiversity and ecosystem functions.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Yang Liu, Mingxin Men, Zhengping Peng, Han Y. H. Chen, Yuanhe Yang, Yunfeng Peng
Summary: So far, the responses of soil respiration and its heterotrophic component to nitrogen addition at a global scale have been uncertain. This study compiled a comprehensive database of 1282 observations from field nitrogen manipulative experiments and used a Random Forest model to quantitatively assess the global effects of nitrogen on soil respiration. The results showed that nitrogen addition significantly increased soil respiration but had minimal impact on its heterotrophic component, contrary to the prevailing view. The study highlights the importance of considering nitrogen effects on soil carbon dynamics in future scenarios with higher anthropogenic activities.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Plant Sciences
Chenyan Huang, Han Y. H. Chen, Scott X. Chang, James F. Cahill, Zilong Ma
Summary: This study investigates the effect of tree species mixtures on root systems in natural forests. The results show that species mixtures have a greater fine root length and a positive impact on forest net primary productivity, especially in older stands. These findings suggest that conserving tree species diversity can improve forest productivity and carbon sequestration.
JOURNAL OF ECOLOGY
(2023)
Article
Multidisciplinary Sciences
Xinli Chen, Anthony R. Taylor, Peter B. Reich, Masumi Hisano, Han Y. H. Chen, Scott X. Chang
Summary: Increasing tree diversity can enhance soil carbon and nitrogen storage, thus mitigating climate change and sustaining soil fertility.
Editorial Material
Energy & Fuels
Zhiqiang Li, Ning Qin, Zhouguang Lu
Article
Biodiversity Conservation
Yuwei Liu, Xiaoming Zou, Han Y. H. Chen, Manuel Delgado-Baquerizo, Cuiting Wang, Chen Zhang, Honghua Ruan
Summary: The frequency and intensity of droughts worldwide pose challenges to the conservation of soil organic carbon. In a 3-year field experiment in a forest plantation, the impacts of drought intensities on microbial necromass at different soil depths were investigated. The results showed that the effects of drought on microbial necromass depend on microbial groups, soil depth, and drought intensity.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Ecology
Kailiang Yu, Philippe Ciais, Anthony A. Bloom, Jingsong Wang, Zhihua Liu, Han Y. H. Chen, Yilong Wang, Yizhao Chen, Ashley P. Ballantyne
Summary: This study empirically tested the outflux approach and generated a spatially explicit map of woody turnover time in mature forests. Comparison with dynamic global vegetation models and data assimilation product showed that outflux method better predicted biomass accumulation rates across continents.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2023)
Article
Chemistry, Multidisciplinary
Zhibin Yi, Liangyu Li, Cheuk Kai Chan, Yaxin Tang, Zhouguang Lu, Chunyi Zhi, Qing Chen, Guangfu Luo
Summary: Achieving high reversibility between the electrodes and electrolyte is crucial for the durability of secondary batteries. Rechargeable zinc-air batteries (RZABs) undergo irreversible changes in the zinc anodes and air cathodes during cycling. Through experiments and calculations, it was found that nanosized mossy zinc dominates the later cycling stage due to increased zincate concentration caused by hydrogen evolution. This mossy structure catalyzes the hydrogen evolution, resulting in oxide passivation on electrodes, low true Coulombic efficiencies, and short battery life. Inspired by these findings, a novel overcharge-cycling protocol is presented to compensate for the Coulombic efficiency loss and extend battery life significantly.
Correction
Multidisciplinary Sciences
Xinli Chen, Anthony R. Taylor, Peter B. Reich, Masumi Hisano, Han Y. H. Chen, Scott X. Chang
Article
Soil Science
Ke Shi, Jiahui Liao, Xiaoming Zou, Han Y. H. Chen, Manuel Delgado-Baquerizo, Zhengming Yan, Tingting Ren, Honghua Ruan
Summary: Through rewilding, microbial extracellular and cellular residues can continuously accumulate in soils and significantly contribute to soil organic carbon sequestration. Extracellular residues are mainly driven by fine root biomass, while cellular residues are mainly driven by soil nitrogen and organic carbon content.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)