Article
Chemistry, Multidisciplinary
Mark P. Stockham, Alice Griffiths, Bo Dong, Peter R. Slater
Summary: Lithium garnets are promising solid-state electrolytes for next-generation lithium-ion batteries, but they undergo a phase transition from cubic to tetragonal phase at a certain Li content. Research has shown that the transition temperature is significantly influenced by the cation radius at the octahedral site.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Crystallography
Mohamad M. Ahmad, Fatimah R. Al-Ghareeb, Hicham Mahfoz Kotb, Sajid Ali Ansari, Tarek S. Kayed, Hassan A. Khater, Shalendra Kumar, Koji Yamada
Summary: In this study, we investigated the effect of Ga+3 substitutions on the Ta+5 sites in LLT-Ga lithium conducting garnets in order to enhance their ionic conductivity. The results showed that the concentration and mobility of Li+ ions increased with increasing Ga+3 content in the materials.
Article
Chemistry, Physical
Keisuke Shigenobu, Frederik Philippi, Seiji Tsuzuki, Hisashi Kokubo, Kaoru Dokko, Masayoshi Watanabe, Kazuhide Ueno
Summary: Electrolytes that transport only Li ions are important in improving charge and discharge properties in Li secondary batteries. However, borate-based Li ionic liquids induce concentration polarisation, resulting in low transference numbers under anion-blocking conditions. This study confirms that the presence of dynamic exchangeable bonds causes electrochemical polarisation and provides a reference for the design of Li ionic liquids with single-ion conducting properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Yan Zeng, Bin Ouyang, Jue Liu, Young-Woon Byeon, Zijian Cai, Lincoln J. Miara, Yan Wang, Gerbrand Ceder
Summary: Experiments demonstrate that using high-entropy metal cation mixes can improve the ionic conductivity of a compound, reduce reliance on specific chemistries, and enhance synthesizability. Local distortions introduced into high-entropy materials create an overlapping distribution of site energies for alkali ions, allowing them to percolate with low activation energy. This study provides important insights into selecting optimal distortion and designing high-entropy superionic conductors across a wide compositional space.
Article
Nanoscience & Nanotechnology
Molleigh B. Preefer, Jason H. Grebenkemper, Catrina E. Wilson, Margaux Everingham, Joya A. Cooley, Ram Seshadri
Summary: The study reveals significant variations in the local structure of 70Li2S-30P2S5 glass samples, affecting the electrochemical performance. It emphasizes the importance of paying attention to the local structure in solid electrolytes, particularly in systems with amorphous components.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yoshifumi Watanabe, Yosuke Ugata, Kazuhide Ueno, Masayoshi Watanabe, Kaoru Dokko
Summary: The ionic conductivity and lithium-ion transference number of electrolytes have a significant impact on the rate capability of Li-ion batteries. Highly concentrated Li-salt/sulfolane (SL) electrolytes show elevated Li+ transference numbers due to lithium-ion hopping via a ligand exchange mechanism. However, these highly concentrated electrolytes (HCEs) have low ionic conductivity and high viscosity. Dilution of HCEs with a non-coordinating hydrofluoroether (HFE) lowers the viscosity and creates localized high-concentration electrolytes (LHCE). The study found that while ion diffusivity increases with increasing HFE content, the Li+ transference number decreases, indicating superior lithium-ion transport in the original HCE compared to LHCEs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Koji Hiraoka, Shiro Seki
Summary: In this study, operando Raman spectroscopy was used to investigate the ionic transport behavior of solid polymer electrolytes (SPEs) in lithium-based and sodium-based electrolytes. The results showed that the concentration of TFSA anions in Li-based electrolyte changed during electrochemical cycling, while it took a longer time for TFSA anions to reach a steady state in Na-based electrolyte, indicating the difficulty of solvation/desolvation of Na+ during ionic transport. Overall, this study elucidated the differences in ionic transport properties between Li-based and Na-based SPEs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Saul Perez Beltran, Xia Cao, Ji-Guang Zhang, Patrick Z. El-Khoury, Perla B. Balbuena
Summary: Localized high concentration electrolytes (LHCE) serve as a feasible dilution strategy for high concentration electrolytes (HCE) to lower viscosity and increase ionic conductivity; TTE competes with Li+ for reactions, altering the reductive/oxidative behavior of the electrolyte.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Inorganic & Nuclear
Cyrille Galven, Maxime Ducamp, Xavier Rocquefelte, Jens Dittmer, Marie-Pierre Crosnier-Lopez, Francoise Le Berre
Summary: A new oxygen-deficient perovskite Ba3LiNb2O8.5 square(0.5) was synthesized and its thermal behavior and color change were investigated. The results suggest that both Nb/Li distribution and oxygen-vacancy location play important roles in the properties of this perovskite.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Cyrille Galven, Maxime Ducamp, Xavier Rocquefelte, Jens Dittmer, Marie-Pierre Crosnier-Lopez, Francoise Le Berre
Summary: The structure of Ba3LiNb2O8.5 square(0.5) was investigated using various techniques, revealing unexpected color change at high temperatures while maintaining structural integrity. First-principles calculations highlighted the importance of Nb/Li distribution and oxygen-vacancy location.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Justin Mark, Katherine E. Woo, Weidi Zhu, Bingheng Ji, Shannon J. Lee, Adedoyin N. Adeyemi, Sabyasachi Sen, Kirill Kovnir
Summary: Two new ternary tetrel pnictide phases, Li1.08Ge4.92As7 and Cs0.11Zn0.05Si0.95As, have been synthesized with new structure types. Li1.08Ge4.92As7 displays a novel Ge-As layer motif, while Cs0.11Zn0.05Si0.95As exhibits a 3D framework composed of fragments of the 2D parent-phase SiAs.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Eduardo Parma, Gabriel F. Costa, Raphael Nagao
Summary: This study investigates the voltage oscillations of Li-ion batteries during galvanostatic operation and highlights the impact of electrochemical properties on the emergence of these oscillations. Numerical simulations are conducted using multiphase porous electrode theory and compared with experimental reports, providing a deeper understanding of the factors influencing the oscillation frequency and morphology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Dan Sun, Masashi Okubo, Atsuo Yamada
Summary: By controlling the water concentration, stable operation of a layered vanadyl phosphate electrode in an aqueous Li+ electrolyte can be achieved. Experimental analyses and density functional theory calculations reveal reversible (de)lithiation occurs between dehydrated phases, which only exist in an optimal water concentration.
Article
Chemistry, Physical
Mengxue He, Xia Li, Xiaofei Yang, Changhong Wang, Matthew Liu Zheng, Ruying Li, Pengjian Zuo, Geping Yin, Xueliang Sun
Summary: A novel electrolyte has been proposed in this study to effectively eliminate the shuttle effect in lithium-sulfur batteries, resulting in stable cycling performance. By utilizing a solid-phase reaction route and forming a compact cathode electrolyte interface film, the developed strategy shows promise for future development of Li-S batteries based on solid-phase conversion.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Linh Le, Meng Liao, Au Nguyen, Donghai Wang
Summary: A formulated carbonated-based electrolyte with LiPF6 was developed, which addressed the issue of poor cycling performance in high-voltage cathodes by providing a stable interface/interphase on both the anode and cathode.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
C. Deviannapoorani, S. Ramakumar, N. Janani, Ramaswamy Murugan
SOLID STATE IONICS
(2015)
Article
Chemistry, Multidisciplinary
L. Dhivya, K. Karthik, S. Ramakumar, Ramaswamy Murugan
Article
Chemistry, Physical
C. Deviannapoorani, Lakshmi S. Shankar, S. Ramakumar, Ramaswamy Murugan
Article
Chemistry, Multidisciplinary
C. Deviannapoorani, S. Ramakumar, Mir Mehraj Ud Din, Ramaswamy Murugan
Review
Materials Science, Multidisciplinary
S. Ramakumar, C. Deviannapoorani, L. Dhivya, Lakshmi S. Shankar, Ramaswamy Murugan
PROGRESS IN MATERIALS SCIENCE
(2017)
Article
Chemistry, Physical
C. Deviannapoorani, L. Dhivya, S. Ramakumar, Ramaswamy Murugan
JOURNAL OF POWER SOURCES
(2013)
Article
Materials Science, Ceramics
C. Deviannapoorani, L. Dhivya, S. Ramakumar, R. Murugan
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2012)
Article
Materials Science, Multidisciplinary
K. Saranya, C. Deviannapoorani, L. Dhivya, S. Ramakumar, N. Janani, Ramaswamy Murugan
Article
Chemistry, Physical
S. Ramakumar, L. Satyanarayana, Sunkara V. Manorama, Ramaswamy Murugan
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2013)
Article
Electrochemistry
Ramakumar Sampathkumar, Maria Echeverria, Yan Zhang, Michel Armand, Montserrat Galceran
Summary: In this work, a thin gold (Au) interlayer is sputtered to enhance the sodium wettability of Na3Zr2Si2PO12, leading to a significant reduction in interfacial resistance and improved stability in Na||NZSP||Na cells. A quasi-solid-state battery, with a Au-sputtered NZSP electrolyte as an intermediate layer, NaFePO4 as a cathode, and metallic sodium as an anode, exhibits a discharge capacity of 100 mAh g(-1) and a similar to 100% Coulombic efficiency at room temperature after 50 charge/discharge cycles at 50 mu A cm(-2).
Article
Chemistry, Physical
Ramakumar Sampath Kumar, Montserrat Galceran
Summary: This study summarizes the electrical properties of solid-state Na-ion conductors with a double perovskite-oxide-like structure. The compound Na0.99La2Ta0.99W0.01O6 exhibits the highest Na+ conductivity and shows stability against the sodium metal anode. These findings suggest the potential of these solid-state sodium batteries as a safer and more efficient energy storage system.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Dasari Bosubabu, Sampathkumar Ramakumar, Sivaraj Jeevanantham, Inthumathi Kanagaraj, Pamula Balaji Bhargav, Nafis Ahmed, Kannadka Ramesha
Summary: In this study, a highly lithophilic LixSiOy layer was successfully formed on carbon cloth (CC) through lithiation of 100 nm thin SiO2, which effectively suppressed the growth of lithium dendrites. The symmetric cell exhibited ultra-stable cycling performance over 1000 hours even at a high current density, and the lithiated SiO2@CC used as a lithium metal-free anode showed stable capacity over 500 cycles. This work provides new insights and paves the way for developing dendrite-free, high-performance Li-S battery technology.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Dasari Bosubahu, Jeevanantham Sivaraj, Ramakumar Sampathkumar, Kannadka Ramesha
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Materials Science, Ceramics
Narayanasamy Janani, Sampathkumar Ramakumar, Subramanian Kannan, Ramaswamy Murugan
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2015)
Article
Chemistry, Inorganic & Nuclear
Vaibhav Bedi, Dipendu Mandal, Zahid Hussain, Shi-Ming Chen, Yile Wu, Zheng-Wang Qu, Stefan Grimme, Douglas W. Stephan
Summary: The reaction of (tBuO(2)CN)(2) with 9-BBN leads to the formation of a bicyclic heterocyclic compound, while its reactions with BF3 or [Et3Si][B(C6F5)(4)] result in the isolation of different compounds. Computational studies reveal that the steric and electronic properties of the Lewis acid are important in the formation of one of the compounds.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chisa Itoh, Haruka Yoshino, Taku Kitayama, Wataru Kosaka, Hitoshi Miyasaka
Summary: A new synthetic route for constructing functional paddlewheel diruthenium(II,II) complexes was developed, utilizing Schiff base condensation reactions. The attached Schiff base groups significantly affected the electronic states of the resulting complexes, as revealed by cyclic voltammetry and DFT calculations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Danrui Ni, Haozhe Wang, Xianghan Xu, Weiwei Xie, Robert J. Cava
Summary: A layered rhombohedral polymorph of indium(iii) triiodide is synthesized at high pressure and temperature. It has an orange color, which is different from ambient pressure InI3, which has a monoclinic molecular structure and a light-yellow color.
DALTON TRANSACTIONS
(2024)
Review
Chemistry, Inorganic & Nuclear
Juan Carlos Perez-Sanchez, Raquel P. Herrera, M. Concepcion Gimeno
Summary: Gold(II) complexes have been less utilized in catalysis compared to their gold(I) and gold(III) counterparts. However, gold(II) complexes offer potential in homo-coupling and cross-coupling reactions, as they are more easily accessible through simplified oxidation and reduction processes. Gold(II) exhibits characteristics of both soft acid gold(I) and hard acid gold(III). This review explores the unique reactivity and potential applications of gold(II) species, highlighting their significance in catalytic transformations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Nighat Yousuf, Yanping Ma, Qaiser Mahmood, Wenjuan Zhang, Yizhou Wang, Hassan Saeed, Wen-Hua Sun
Summary: In this study, a series of structurally rigid cyclooctyl-fused iminopyridine iron complexes were synthesized and used with methylaluminoxane for isoprene polymerization. The extent of steric hindrance of the ligand framework was found to significantly affect catalytic performance, with less hindrance leading to better activity and stability.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chenghao Song, Huiwei Du, Menglei Xu, Jie Yang, Xinyu Zhang, Jungan Wang, Yuanfang Zhang, Chengjun Gu, Rui Li, Tao Hong, Jingji Zhang, Jiangying Wang, Yongchun Ye
Summary: This study improves the performance of perovskite solar cells by using a dual-hole transport layer strategy. This strategy enhances the charge transfer efficiency of the transport layer, reduces charge recombination, and improves the quality of the perovskite film layer. Ultimately, the stability of the device is enhanced.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mahender Singh, Aakash Yadav, Ranjit Singh, Chullikkattil P. Pradeep
Summary: A new aryl selenonium polyoxometalate hybrid was developed and compared with an aryl sulfonium polyoxometalate hybrid in terms of their photocatalytic properties. It was found that the aryl selenonium hybrid exhibited better catalytic performance, which could be attributed to the larger atomic radii of selenium stabilizing the photogenerated electron-hole pair more efficiently. Additionally, the generation of elemental selenium through cleavage of C-Se bonds during catalysis was observed.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Yuhan Xie, Boyu Dong, Xuemin Wang, Siyuan Wang, Jinxi Chen, Yongbing Lou
Summary: This study successfully fabricated visible-light-responsive three-dimensional core-shell CoSe2/ZnIn2S4 heterostructures and achieved attractive activity in photocatalytic hydrogen evolution. The presence of CoSe2 improved light absorption and accelerated charge transfer kinetics. The strong interaction between CoSe2 and ZnIn2S4 reduced charge recombination, further enhancing photocatalytic activity for hydrogen evolution.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Andre L. de O. Batista, Joao Marcos T. Palheta, Mauricio J. Piotrowski, Celso R. C. Rego, Diego Guedes-Sobrinho, Alexandre C. Dias
Summary: This study presents a simulation protocol that provides a solid foundation for exploring two-dimensional materials. Using the TiBr2 2H monolayer as an example, the study reveals its promising properties for optoelectronic and valleytronic applications, including its stability, spin-orbit coupling effects, and optical helicity selection rule.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Jiang Jiang, Zi-Wei Li, Zhi-Zhuan Zhang, Bin Tan, Zhao-Feng Wu, Xiao-Ying Huang
Summary: In this work, two metal organic frameworks (MOFs) containing {Cu2I2} clusters, Eu-CuI-INA and Sr-K-CuI-INA, were synthesized and characterized. Both materials have a three-dimensional structure with {Cu2I2} clusters coordinated by INA(-) ligands and Eu3+ or Sr2+ ions. The Sr-K-CuI-INA material exhibited sensitive fluorescence sensing behaviors towards cysteine and nitro-bearing molecules, showing potential applications in bio and explosive molecule sensing. This work provides a good reference for designing fluorescent MOF probes containing CuI molecules.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhiya Lin, Jiasheng Wu, Qianwen Ye, Yulong Chen, Hai Jia, Xiaohui Huang, Shaoming Ying
Summary: Na-ion batteries (NIBs) have attracted great interest as a potential technology for grid-scale energy storage due to the wide distribution, low cost, and environmental friendliness of sodium resources. However, their implementation is hindered by low rate capability and cycling stability caused by the large ionic size of Na+. In this study, a three-dimensional nanoarchitectured coral-like CoSe2@N-doped carbon (CL-CoSe2@NC) was synthesized, and it exhibited improved sodium storage properties with better electrode kinetics and a stable SEI film.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Ya-Qiong Zhang, Yu Zhang, Guoping Zeng, Rong-Zhen Liao, Man Li
Summary: The mechanism and selectivity of CO2 reduction under visible light were investigated using density functional calculations. The results showed that a tetradentate PNNP-type Iridium(III) complex exhibited high activity and selectivity in the reaction.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Sanyukta Ghosh, Shubhanth Jain, Soumya Ranjan Mishra, Gerda Rogl, Peter Rogl, Ernst Bauer, B. S. Murty, A. Govindaraj, Ramesh Chandra Mallik
Summary: In this study, reduced graphene oxide (rGO) was uniformly dispersed in the In0.5Co4Sb12 bulk material by ultrasonication, which effectively reduced the lattice thermal conductivity and improved the thermoelectric efficiency.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mika Takeuchi, Yutaka Amao
Summary: This study developed an effective visible-light driven system for fumaric acid production using renewable resources such as biomass derivatives, providing an alternative to the current petroleum-based synthesis methods.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Juan Jian, Meiting Wang, Zhuo Wang, Jingwen Meng, Yuqin Yang, Limin Chang
Summary: Developing low-cost and self-supported bifunctional catalysts is crucial for highly efficient water splitting devices. In this study, nano-NiFe2O4 was directly grown onto iron foil surface and Sn4+ was introduced into the NiFe2O4. The resulting Sn-NiFe2O4/IF showed low overpotentials and high current densities during oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), making it a promising catalyst for large-scale hydrogen production.
DALTON TRANSACTIONS
(2024)
