Article
Chemistry, Physical
Sunwook Kim, Sungmin Na, Joonchul Kim, Tae Hwan Jun, Myoung Hwan Oh, Kyoungmin Min, Kwangjin Park
Summary: This study focuses on finding a coating material to replace cobalt in order to address the issues of Ni-rich cathode materials. The Ni/Hf coated sample shows higher initial capacity, improved rate capability, higher Li-ion diffusion coefficient, reduced charge-transfer resistance, enhanced cycle retention, and the ability to suppress side reactions and large volume change compared to other coatings and the pristine sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Chunxiao Xu, Yayong Li, Ryan A. Adams, Vilas G. Pol, Yang Xiao, Arvind Varma, Pengwan Chen
Summary: A carbon-coated NiO/Ni (NiO/Ni@C) composite was successfully synthesized via a one-step solution combustion method, showing high reversible specific capacity and excellent rate performance as anode material for lithium and sodium ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Gyeongbin Ko, Seongdeock Jeong, Sanghyuk Park, Jimin Lee, Seoa Kim, Youngjun Shin, Wooseok Kim, Kyungjung Kwon
Summary: Lithium-ion batteries (LIBs) are crucial for the electric vehicle (EV) industry, and LiNi1-x-yCoxMnyO2 (NCM) is the dominant cathode material used in EV LIBs. Due to the need for increased driving range, Ni content in NCM is maximized, but the resulting Ni-rich NCM is unstable. Doping with foreign elements has been explored as a strategy to overcome this instability, with over 46 elements considered and their effects on LIB performance investigated in numerous research articles. This comprehensive analysis of various doping elements and their impact on LIB performance provides valuable insights for the LIB industry and academia.
ENERGY STORAGE MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yining Zou, Zuoxing Guo, Lin Ye, Yuhuan Cui, Kaiwen Zheng, Lijun Zhao
Summary: Transition metals and their oxides are widely studied as anode materials for lithium-ion batteries due to their high theoretical capacities. A porous raspberry-like nickel-enhanced MnO-based carbon-containing composite (Ni/MnO-C) has been successfully synthesized, increasing the specific capacity of LIBs. The porous nanostructure provides buffer space to prevent structural damage and, when broken into smaller nanoparticles, exposes more active sites for additional capacities.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jongha Hwang, Mincheol Jung, Jin-Ju Park, Eun-Kyung Kim, Gunoh Lee, Kyung Jin Lee, Jae-Hak Choi, Woo-Jin Song
Summary: Silicon-based electrodes are considered promising anodes for high-energy-density lithium-ion batteries due to their advantages, but the large volume change and low electrical conductivity during charge-discharge process are critical issues. In this study, the researchers solved the problem of volume expansion by applying a carbon coating method using low-cost phenolic resin, resulting in high-performance lithium-ion batteries.
Article
Chemistry, Multidisciplinary
Zitong Liu, Kazuhiro Shikinaka, Yuichiro Otsuka, Yoichi Tominaga
Summary: The addition of a small amount of plant biomass-based lignin greatly enhances the ionic conductivity of composite polymer electrolytes at room temperature. These electrolytes can be easily fabricated in a low carbon manner and are suitable for future all-solid-state battery applications.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jin Liu, Xingcheng Xiao, Daad Haddad, Qinglin Zhang, Mei Cai, Sherman Zeng
Summary: The study shows that using lithium-ion exchanged zeolite (Li-zeolite) as an additive to cathode electrodes can improve battery cycle life, especially performing better at high temperatures. Li-zeolite is envisioned as a low-cost and scalable path to enhance the performance of LMO and LMO blended electrodes.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Yanli Tan, Chunxiao Yang, Weiwei Qian, Xin Sui, Chao Teng, Qun Li, Zhou Lu
Summary: Carbon-coated porous Co3O4 polyhedrons with (220) facets were successfully fabricated through a hydrothermal method and subsequent calcination process, exhibiting discharge capacities of 1463 and 596 mA h g(-1) at 100 and 5000 mA g(-1) respectively. After 150 charge-discharge cycles, the anode maintained a reversible capacity of 840 mA h g(-1) at 1000 mA g(-1).
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Giseung Lee, Kwangeun Jung, Yongho Lee, Jeonghan Kim, Taeeun Yim
Summary: Functionalized nickel-rich lithium metal oxide cathode materials using nano-titanium silicate as coating showed improved cycling performance in lithium-ion batteries by inhibiting electrolyte decomposition and maintaining particle hardness. This study demonstrates the potential of nano-titanium silicate as an effective coating material for enhancing the cycling behavior of lithium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Jiajie Wang, Fan Wang, Ziheng Guan, Junjie Wei, Yingjie Tao, Lanze Li, Shijie Ma, Sai Wu, Yajun Pang, Zhehong Shen, Hao Chen
Summary: Carbon/manganese oxide hybrid materials have attracted extensive attention as lithium-ion battery anode materials due to their abundant resources and simple preparation. However, their poor rate performance, weak cycle stability, and relatively high cost hinder their further development. In this study, a novel carbon/manganese oxide hybrid material was fabricated using low-cost carbonized bamboo leaves and manganese nitrate. The addition of MnSiO3 component in the hybrid material improved its intrinsic conductivity and Li+ diffusion ability, resulting in significantly improved rate capability and cycle performance compared to the hybrid material without MnSiO3. The excellent electrochemical performance of the hybrid material enables its application in lithium-ion full batteries with considerable energy storage performance.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
E. Duraisamy, E. Sujithkrishnan, K. Kannadasan, P. Prabunathan, P. Elumalai
Summary: In this study, a nickel/nickel oxide/carbon matrix was successfully prepared using a simple pyrolysis method and utilized as an anode material for lithium-ion batteries. The stable lithium storage performance was attributed to conversion/re-conversion reactions and the cushioning effect of the carbon matrix. The full-cell demonstrated a discharge capacity of 400 mA h g(-1) at 0.1C-rate and retained 70% capacity even after 500 cycles, powering a green LED bulb for over 9 hours continuously on a single charge.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Safina-E-Tahura Siddiqui, Md Arafat Rahman, Jin-Hyuk Kim, Sazzad Bin Sharif, Sourav Paul
Summary: Lithium-ion batteries (LIBs) are widely used in various applications, but carbon-based materials as anodes have some issues, leading to the search for alternatives. Transition metal oxides (TMOs) like NiO can be used as substitutes. This study reviews the electrochemical performance of binder-involved nanocomposites of NiO as LIB anodes and proposes future advances in NiO nanocomposites.
Article
Chemistry, Multidisciplinary
Kyu-Young Park, Yizhou Zhu, Carlos G. Torres-Castanedo, Hee Joon Jung, Norman S. Luu, Ozge Kahvecioglu, Yiseul Yoo, Jung-Woo T. Seo, Julia R. Downing, Hee-Dae Lim, Michael J. Bedzyk, Christopher Wolverton, Mark C. Hersam
Summary: This study investigates the degradation mechanisms of cobalt-free LiNiO2 at high voltages, and finds that lattice oxygen loss plays a critical role in the formation of irreversible stacking faults during cycling. By using a graphene coating, the oxygen loss is attenuated, leading to improved high-voltage capacity retention of LiNiO2.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Sidra Jamil, Qiwen Ran, Li Yang, Yan Huang, Shuang Cao, Xiukang Yang, Xianyou Wang
Summary: The Ni-rich layered oxide cathode material, LiNi0.87Co0.1Al0.03O2, modified with amorphous Li+-ion conductor Li2O-BPO4 coating, shows improved cycling stability and rate capability, making it a promising candidate for high-voltage applications in lithium ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Min Lin, Deliang Cheng, Jiangwen Liu, Liuzhang Ouyang, Renzong Hu, Jun Liu, Lichun Yang, Min Zhu
Summary: The dual-carbon-confined SnS@C/rGO nanostructure shows enhanced rate capability and cycling stability for lithium-ion batteries, demonstrating the potential application of dual-carbon modification in high-performance electrode materials.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
Article
Engineering, Chemical
Xiaoping Li, Jiaxin Pan, Jinwen Shi, Yanlin Chai, Songwei Hu, Qiaorong Han, Yanming Zhang, Xianwen Li, Dengwei Jing
Summary: Despite ongoing research, the use of nanoparticles to enhance the drag reduction performance of polymer drag reducers remains controversial, particularly with regard to the underlying fluid dynamics mechanism. This study investigates the effects of adding SiO2 nanoparticles to various polymer polyacrylamide (PAM) solutions and identifies the optimal combination with cationic polyacrylamide. Results show that the addition of SiO2 nanoparticles efficiently reduces drag at higher flow rates (Reynolds numbers above 6000), but has a negative effect below this range. The dual effects of SiO2 nanoparticles, including increased flow resistance due to Brownian motion and decreased flow resistance by protecting polymer chains under high shear conditions, contribute to the drag reduction performance of polymer drag reducers, particularly at optimal nanoparticle concentrations and higher Reynolds numbers. This research serves as a guide for applications such as natural gas fracturing, where high flow rates are common.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Lihao Song, Bowen Bai, Xiaoping Li, Gezhao Niu, Yanming Liu, Yiding Mao
Summary: Hypersonic vehicle-borne synthetic aperture radar (SAR) imaging has promising application prospects for remote sensing due to its fast response and flexible trajectory. However, the phenomenon of plasma sheath during hypersonic flight has a serious impact on hypersonic vehicle-borne SAR imaging. Therefore, this study systematically investigates the effect of plasma sheath on hypersonic vehicle-borne SAR imaging. Analytical formulas are derived for the phase shift, amplitude attenuation, linear phase errors, and quadratic phase errors, providing insights into the image shift, pulse broadening, submerged point target response, and asymmetric distortion caused by plasma sheath. Quantitative evaluation and analysis of SAR imaging degradation under different conditions are conducted, contributing to the improvement of hypersonic vehicle-borne SAR imaging under plasma sheath in the future.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Physics, Fluids & Plasmas
Gezhao Niu, Yanming Liu, Bowen Bai, Yi Ding, Lihao Song, Xiaoping Li
Summary: This article deploys an electromagnetic simulation model of a 3-D inhomogeneous plasma-covered metal plate to study the scattered properties of linear polarization plane waves obliquely incident on the plasma. The effects of plasma parameters and incident angle on the scattered properties are investigated, and the influences of EM wave polarization mode on the polarization properties of the scattered wave are analyzed. The results provide a theoretical basis for research on RCS measurement, polarization matching, and EM stealth of plasma-sheath-covered hypersonic vehicles.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Physics, Fluids & Plasmas
Yi Ding, Bowen Bai, Gezhao Niu, Xiaoping Li, Yanming Liu
Summary: When the reentry target enters the earth's atmosphere, a plasma sheath forms on its surface. During radar detection, the echo signal couples with different Doppler frequency components, causing mismatches with the matched filter and generating false targets on the range profile. Additionally, the high speed of the reentry target leads to migration through range cells, further impacting detection and recognition. This article proposes an improved frequency-domain compensation method to address false targets and migration, effectively enhancing the detection and tracking of plasma-sheath-covered targets.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Instruments & Instrumentation
Weifeng Deng, Yanming Liu, Rui Li, Jia Zhang, Xiaoping Li, Weimin Bao
Summary: This paper designs a single probe (SP) to study plasma parameters in a high enthalpy ICP-heated wind tunnel. It is discovered that the electron temperature in the core region is about 2.4 eV, while in the edge region it is about 3-4 eV. At the maximum power of the high enthalpy ICP-heated wind tunnel, the electron density reaches 4.34x1013 cm-3. Additionally, the line integral density measured by SP is found to be 0.8 times higher than that measured by the HCN interferometer, indicating a consistent trend between the probe diagnosis and the laser diagnosis results.
JOURNAL OF INSTRUMENTATION
(2023)
Article
Engineering, Aerospace
Sibo Zhao, Jianwen Zhu, Weimin Bao, Xiaoping Li
Summary: This manuscript presents a three-dimensional high-dynamic intelligent maneuvering guidance strategy based on optimal control and deep reinforcement learning (DRL) to address the coordination between maneuvering penetration and high-precision guidance in complex flight missions of high-velocity vehicle. The strategy utilizes a longitudinal maneuvering model with instantaneous miss distance as a control variable and employs the maximum value principle to obtain the optimal maneuver duration and start timing. In the lateral direction, a Markov decision process model is proposed to synthesize guidance error and miss distance and a reward function is designed considering maneuver and guidance performance. The simulation results demonstrate that the intelligent maneuvering guidance strategy can improve penetration performance, reduce the influence of maneuver flight on guidance accuracy, and ensure adaptability under changeable flight missions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Chemistry, Analytical
Zhiming Zhao, Xiaoping Li, Guoxiang Dong
Summary: Traditional stealth technologies have problems of high cost and large thickness, which can be solved by using novelty checkerboard metasurface in stealth technology. The hybrid checkerboard metasurface with two types of polarization converter units arranged in turn can effectively reduce radar cross-section (RCS) and be insensitive to the polarization of incoming EM waves. The experiment and simulation results prove the effectiveness of mutual compensation in the field of checkerboard metasurfaces for stealth technology.
Review
Biotechnology & Applied Microbiology
Hongmin Wang, Christa C. C. Huber, Xiao-Ping Li
Summary: Alzheimer's disease (AD) is a common form of dementia, affecting over 10% of the population aged 65 and older. AD is characterized by progressive loss of neurons and synapses, formation of amyloid plaques and neurofibrillary tangles, neuroinflammation, blood-brain barrier breakdown, mitochondrial dysfunction, and oxidative stress. Stem cell-derived exosomes show promise in treating AD as they possess anti-apoptotic, anti-inflammatory, and antioxidant properties. These exosomes also promote neurogenesis, angiogenesis, and BBB repair. This review discusses the neuropathological features of AD and explores the use of stem cell-derived exosomes in AD therapy.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Aerospace
Haifeng Sun, Dingkai Yao, Lirong Shen, Zhongwen Deng, Weiming Bao, Xiaoping Li, Wencong Wang, Qingyong Zhou
Summary: Using observations of millisecond pulsars, this study compares the 5-year rotation stability between X-ray data from NICER and radio data from NANOGrav. The analysis includes data screening, parameter fitting, and consideration of factors affecting pulsar rotation stability. The results show that the rotation stability of PSR B1937 + 21 based on NICER observations is comparable to NANOGrav data, with an accuracy of 1.7 x 10-14.
Article
Engineering, Chemical
Xiao Su, Xiaoping Li, Yi Zhang, Qing Guo, Xingguo Zhang, Haixia Yu, Dachao Li
Summary: This paper presents a simple and cost-effective method for fabricating a microreactor array chip that enables high-throughput DNA synthesis with a three orders of magnitude enhancement in synthesis capacity. The chip is made by inkjet printing a massive droplet array of silica nanoparticle slurry on a chemically-modified surface. The dense microreactor array is obtained through the three-phase contact line (TCL)-confined nanoparticle aggregating process, controlled by the receding contact angle (RCA) of the modified substrates. The proposed microarray chip shows great potential for high-throughput and high-capacity DNA synthesis.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
He Huang, Xiaoping Li, Shizhong Liu, Yanming Liu
Summary: This article introduces a new strategy to reduce antenna height. The basic idea is to replace the half-wave dipole with a full-wave dipole to maintain a large input impedance. By adjusting the position and rotation of the arms, a half-sized dipole with an input impedance of 50Ω is obtained. The improved structure allows for wideband applications and expansion into a dual-polarized subarray with a height of only 0.08λ.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Physics, Fluids & Plasmas
Fei Ding, Yanming Liu, Jing Jia, Xiaoping Li, Jiaxin Li, Yingxin Zhao, Rui Li
Summary: This paper studied how to reconstruct the 3D emission field of the inductively coupled plasma (ICP) jet and proposed a multiscale calculation method to reduce the size of the weight matrix. A 3D reconstruction system was eventually established, which demonstrated the non-uniform structure of the ICP jet. The re-projection error of the reconstructed ICP jet verified the high reconstruction accuracy of the proposed method.
PHYSICS OF PLASMAS
(2023)
Article
Engineering, Electrical & Electronic
Zhiwei Chen, Wei Zheng, Wenjie Yin, Xiaoping Li, Meihong Ma
Summary: In order to rationalize the utilization of water resources, it is important to obtain high-resolution products that can accurately estimate the spatiotemporal changes in regional water resources. This study proposes a geographically weighted regression downscaled model (GWRDM) to improve the spatial resolution of terrestrial water storage (TWS) products obtained from the GRACE satellite. The results show that the downscaled TWS based on GWRDM outperforms other downscaled models, and the downscaled groundwater storage (GWS) based on GWRDM agrees well with in situ observations. Therefore, GWRDM provides a practical algorithm for obtaining high-resolution water storage estimates and contributes to small-scale regional water resources management.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Engineering, Aerospace
Haifeng Sun, Jianyu Su, Zhongwen Deng, Lirong Shen, Weimin Bao, Xiaoping LI, Liansheng LI, Zhe Su, Wencong Wang
Summary: X-ray pulsar-based navigation technology provides necessary navigation information in the solar system, with SEPO technique estimating orbital elements and optimizing positioning and velocity accuracy through high-flux observations.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Green & Sustainable Science & Technology
Mengqi Cong, Yang Zhang, Yunlong Zhang, Xiao Liu, Yalin Lu, Xiaoping Li
Summary: Magnesium alloy is considered as a promising biomaterial for bone regeneration. In this study, a Mg-6Zn-4Si alloy reinforced with in-situ Mg2Si phase and yttrium (Y) addition was comprehensively investigated. The primary and eutectic Mg2Si phases were significantly modified by the Y addition, leading to a reduction in primary phase size to around 20 μm. The wear resistance and tensile properties of the Mg-Zn-Si alloy were improved by the addition of 0.5 wt.% Y, with 50% higher ultimate tensile strength and 65% higher elongation compared to the ternary alloy. Excessive Y addition (1.0 wt.%) deteriorated the tensile properties. This improvement can be attributed to the modification of Mg2Si phases and solid solution strengthening of Y atoms. This study provides implications for the application of Y-containing Mg-Zn-Si alloys as regeneration implants.
JOURNAL OF RENEWABLE MATERIALS
(2023)
