Article
Chemistry, Physical
Dongli Qin, Feng Pan, Jie Zhou, Zibo Xu, Yuan Deng
Summary: A method based on FET is proposed to optimize the thermoelectric properties of bismuth telluride thin films, allowing control over Seebeck coefficient, electrical conductivity, and carrier type. The experiments showed promising results in achieving high power factor and ZT values in both N-type and P-type. Furthermore, a N-P pair device was constructed by applying different gate voltages on the thin films, and Te-doped bismuth telluride thin films demonstrated adjustable sensitivity in a thin film thermocouple.
Article
Chemistry, Multidisciplinary
Qichao Chen, Jiayi Chen, Xiao Xu, Zhehan Wang, Yamei Ding, Le Xiong, Beibei Zhu, Li Tao
Summary: Vapor-solid growth (VSG) is an effective technique for synthesizing Bi2Se3 materials with promising thermoelectric performance. By regulating the carrier gas flow rate during the VSG process, smooth Bi2Se3 thin films with enhanced TE performance have been achieved. The optimized morphology improves the electrical conductivity and decouples its interplay with the Seebeck coefficient in Bi2Se3.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Physical
Farah M. El-Makaty, K. Andre Mkhoyan, Khaled M. Youssef
Summary: This study investigated the effects of graphene's structural integrity on the thermoelectric properties of n type bismuth telluride alloy. The addition of graphene during the last phase of mechanical milling was found to enhance electrical conductivity and Seebeck coefficient. Additionally, an improvement in the figure-of-merit was observed when 0.05 wt% graphene was added in the last 10 mins of milling.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Green & Sustainable Science & Technology
Zhuang-Hao Zheng, Xiao-Lei Shi, Dong-Wei Ao, Wei-Di Liu, Meng Li, Liang-Zhi Kou, Yue-Xing Chen, Fu Li, Meng Wei, Guang-Xing Liang, Ping Fan, Gao Qing (Max) Lu, Zhi-Gang Chen
Summary: Flexible thermoelectric materials with high performance and flexibility show potential for converting waste heat into useful electricity. The textured structure design of Bi2Te3 thin films provides high thermoelectric performance and withstands 2,000 bending tests, demonstrating excellent flexibility. A flexible device assembled from 40 pairs of thin films exhibits outstanding output power density under temperature gradient, indicating its potential application in harvesting thermal energy from the environment or human bodies.
NATURE SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
M. Sinduja, S. Amirthapandian, P. Magudapathy, Anha Masarat, R. Krishnan, S. K. Srivastava, K. Asokan
Summary: This study investigates the effect of defects on the thermoelectric transport properties of Bi2Te3 thin films using 120 keV He+ and Ar+ ion irradiation. The change of carrier type from n-type to p-type was observed with He+ ion irradiation, while p-type conductivity at lower ion fluence and n-type conductivity at higher ion fluences were observed with Ar+ ion irradiation. The highest power factor value was achieved at room temperature with He+ ion fluence of 1 x 10^15 ions/cm^2.
Article
Materials Science, Multidisciplinary
Zhi-Lei Wang, Toshiyuki Funada, Tetsuhiko Onda, Zhong-Chun Chen
Summary: Major advances in materials research often require serendipity and chemical intuition. Traditional trial-and-error-based experimental studies are becoming insufficient for designing novel high-performance materials. This work employed machine learning to aid the design of hot-extruded Bi2Te2.85Se0.15 bulk thermoelectric materials based on a small amount of in-house experimental data. The data-driven strategy breaks the rules of thumb in traditional experimental studies and extracts new knowledge to guide the design of high-performance Bi2Te3-based bulk thermoelectric materials.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
K. A. Morgan, I Zeimpekis, Z. Feng, D. Hewak
Summary: The optimization of sputtered bismuth telluride and germanium telluride at 300 degrees C showed enhanced performance of thermoelectric generators on polyimide substrates. Post-annealing, the power factor of BiTe films increased up to 2.2 μW/cmK(2) and GeTe increased by over 5 orders of magnitude to 7.6 μW/cmK(2). A flexible thermoelectric generator was fabricated using alternating annealed BiTe and GeTe strips, achieving 7 nW of output power per pair at a temperature difference of 20 degrees C.
Article
Chemistry, Physical
Shaojun Liang, Hanming Zhu, Xue Ge, Song Yue
Summary: Thin films of Bi0.5Sb1.5Te3/PbTe composites with high orientation were prepared by magnetron co-sputtering, showing improved thermoelectric properties after annealing. The highest power factor reached about 2.06 mW/mK(2) at 480 K, nearly 5 times higher than that of the parent Bi0.5Sb1.5Te3 film.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Jose F. Serrano-Claumarchirant, Bejan Hamawandi, Adem B. Ergul, Andres Cantarero, Clara M. Gomez, Pankaj Priyadarshi, Neophytos Neophytou, Muhammet S. Toprak
Summary: This study focuses on the development of large-area thermoelectric films using hybrid materials. By blending TE materials with polymers and using a specific solvent, durable polymer, and additive in the ink formulation, the researchers successfully fabricated large-area homogeneous hybrid TE films with improved conductivity and TE power factor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Materials Science, Multidisciplinary
Farah M. El-Makaty, Hira Khalil Ahmed, Khaled M. Youssef
Summary: This review paper discusses the impact of nanosized fillers on bismuth telluride nanocomposites for thermoelectric applications, presenting mechanisms for enhancing thermoelectric properties and indicating that doped composites offer better performance. The findings suggest that improvements in thermoelectric properties with nanofillers are significant, especially in doped bismuth telluride composites.
MATERIALS & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Ling Li, Ningqiang Shi, Xiangqian Jiang, Weiping Chen, Chuncheng Ban, Jiandong Hao
Summary: This study focuses on the synthesis of high-quality bismuth telluride (Bi2Te3) nanowires and boron nitride nanotubes (BNNTs), as well as the preparation of Bi2Te3-BNNTs and Bi2Te3-BCNNTs composite films. The obtained composite films exhibit high electrical conductivity, good flexibility, and thermal stability. They show great potential for application in thermoelectric conversion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Lisha Fan, Jiyong Tang, Ling Wu, Shuowen Zhang, Fan Liu, Jianhua Yao, Lianbo Guo
Summary: This study proposes a fast and efficient laser annealing method to synthesize high-quality bismuth telluride thin films at room temperature. Compared with conventional thermal annealing, laser annealing can increase the production rate of Bi2Te3 and produce films with superior thermoelectric performance.
APPLIED SURFACE SCIENCE
(2023)
Review
Nanoscience & Nanotechnology
Prosper Ngabonziza
Summary: This paper reviews recent developments in quantum transport, focusing on the contribution of topological insulator boundary states to thermoelectricity in Bi2Te3 thin films. The ability to grow high-quality epitaxial films and fabricate sophisticated devices opens up possibilities for exploring topological quantum devices and improving the thermoelectric properties of Bi2Te3. The potential of topological states to enhance thermoelectric performance and the current progress in this area are discussed.
Article
Materials Science, Ceramics
Minsu Kim, Dabin Park, Jooheon Kim
Summary: Carbon cloth was used as a flexible substrate to synthesize bismuth telluride particles with added selenium for improved thermoelectric performance. The maximum power factor reached 1300 mu W/mK(2) for the 30% Se-doped sample, demonstrating the potential of carbon cloth substrate for low temperature range applications.
CERAMICS INTERNATIONAL
(2022)
Review
Engineering, Electrical & Electronic
Qihao Zhang, Kangfa Deng, Lennart Wilkens, Heiko Reith, Kornelius Nielsch
Summary: This review examines the development of micro-thermoelectric devices, exploring progress in device design, integration, and performance, as well as the potential applications of the technology in cooling, power generation, and sensing. These devices offer faster response time, higher resolution, and greater power density compared to their commercial counterparts, making them crucial for highly integrated electronic devices, the Internet of Things, and flexible and wearable technology.
NATURE ELECTRONICS
(2022)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)