A5100450571- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Conducting polymers and applications
- Graphene research and applications
- Extraction and Separation Processes
- Photoreceptor and optogenetics research
- Graphene and Nanomaterials Applications
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Measurement and Detection Methods
- Neuroscience and Neural Engineering
- Phase Change Materials Research
- Magnesium Oxide Properties and Applications
- Wireless Body Area Networks
- Heat Transfer and Optimization
- Radio Wave Propagation Studies
- Calcium Carbonate Crystallization and Inhibition
- Autonomous Vehicle Technology and Safety
- Systemic Lupus Erythematosus Research
- Obsessive-Compulsive Spectrum Disorders
- Semiconductor materials and devices
- Layered Double Hydroxides Synthesis and Applications
University of Science and Technology Liaoning
2023-2025
Soochow University
2024-2025
Nikolaev Institute of Inorganic Chemistry
2024
Nanjing University of Science and Technology
2021-2024
Chinese Academy of Medical Sciences Dermatology Hospital
2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Institute of Mechanics
2024
Chinese Academy of Sciences
2024
Huaqiao University
2024
Jilin Medical University
2023
As a derivative of LiNiO2, NCA (LiNi1-x-yCoxAlyO2) is widely used in the electric vehicle industry because its high energy density. It thought that Co and Al both play important roles enhancing material properties. However, there no solid evidence literature clearly shows required with nickel (e.g. when 1-x-y > 0.9) content. Therefore, systematic study on different cation substituents series LiNi1-nMnO2 (M = Al, Mn, Mg, or Co) materials was made. In-situ X-ray diffraction (XRD) differential...
LiNi1–x–yCoxAlyO2 (NCA) and LiNi1–x–yMnxCoyO2 (NMC) materials are widely used in electric vehicle energy storage applications. Derived from LiNiO2, NCA NMC with various chemistries were developed by replacing Ni different cations. Many studies of the failure mechanisms have attributed cell degradation to anisotropic volume change particles. In this work, it is shown that for Ni-rich layered transition metal oxide materials, regardless composition, unit volumes an almost identical manner...
Ni-rich transition metal layered oxide materials are of great interest as positive electrode for lithium ion batteries. As the popular NMC (LiNi1-x-yMnxCoyO2) and NCA (LiNi1-x-yCoxAlyO2) become more Ni-rich, they approach LiNiO2. Therefore it is important to benchmark structure electrochemistry state art LixNiO2 convenience researchers in field. In this work, LiNiO2 synthesized from a commercial Ni(OH)2 precursor modern synthesis methods shows specific capacity close theoretical 274 mAh/g....
Single crystal LiNi0.5Mn0.3Co0.2O2 (NMC532) was shown to have superior stability at high voltages and elevated temperatures compared conventional polycrystalline NMC532 by the authors. Conventional LiNi0.6Mn0.2Co0.2O2 (NMC622) usually offers more capacity than when charged same upper cutoff voltage so NMC622 is attractive. It expected that single could also provide better performance typical materials. This work explores synthesis of preferred conditions were found. A washing reheating...
Single crystal Li[Ni0.5Mn0.3Co0.2]O2 materials in NMC532/artificial graphite cells have excellent long term charge-discharge cycle lifetime which greatly exceeds that of conventional NMC532 materials. There are a few patents from industry regarding the synthesis single NMC. In addition, there only been reports academic literature showing NMC with grain size ∼2–5 μm having good electrochemical performance was successfully synthesized, but these workers used complex approaches. This work...
Aqueous Zn batteries (AZBs) are a promising energy storage technology, due to their high theoretical capacity, low redox potential, and safety. However, dendrite growth parasitic reactions occurring at the surface of metallic result in severe instability. Here we report new method achieve ultrafine nanograin anodes by using ethylene glycol monomethyl ether (EGME) molecules manipulate zinc nucleation processes. It is demonstrated that EGME complexes with Zn2+ moderately increase driving force...
Single crystal positive electrode materials for lithium-ion batteries have superior properties compared to their polycrystalline counterparts as has been demonstrated by industry and academia. LiNi0.5Mn0.3Co0.2O2 (NMC532), NMC622 now NMC811 successfully commercialized. However, single LiNi1-x-yCoxAlyO2(NCA) not reported yet. One simple method producing NMC material requiring high temperature excess lithium during synthesis creates Li5AlO4 impurities if applied directly in attempts synthesize...
Nickel-rich LiNixMnyCozO2 materials (x + y z = 1, x ≥ 0.6) (NMC) are one of the most promising positive electrode candidates for lithium-ion cells due to their high specific capacity, ease production, and moderate cost. Conventional NMC such as LiNi0.4Mn0.4Co0.2O2 (NMC442), LiNi0.5Mn0.3Co0.2O2 (NMC532), LiNi0.6Mn0.2Co0.2O2 (NMC622), etc. have 20% costly Co among transition metal atoms. To lower content while maintaining good electrochemical performance, three series with different ratios,...
Abstract Lithium–sulfur (Li–S) batteries present a promising solution to high‐energy and low‐cost energy storage. However, the conversion‐type redox mechanism determines poor fulfillment of battery chemistry in terms reversibility kinetics. Herein, flower‐like graphene microassembly decorated with finely‐dispersed Ni 2 Co nanoalloy (Ni Co@rGO) is developed as advanced host matrix for Li–S batteries. Combining computational, physicochemical, electrochemical studies, nanoalloys are unveiled...
Lithium-sulfur batteries (LSBs) are promising candidates for next-generation high-efficiency energy storage, yet their practical implementation is seriously impeded by the parasitic shuttle effect and sluggish reaction kinetics. Herein, we develop a unique Cu, Co layered double hydroxide (CuCo-LDH) with hollow hierarchical structure as an advanced electrocatalyst to tackle these challenges. Combining compositional, architectural, chemical advantages, as-developed CuCo-LDH enables facile...
Current treatments for fundus disorders, such as intravitreal injections, pose risks, including infection and retinal detachment, are limited in their ability to deliver macromolecular drugs across the blood‒retinal barrier. Although non-invasive methods safer, delivery efficiency remains suboptimal (<5%). We have developed a wearable electrodriven switch (WES) that improves of macromolecules fundus. The WES system, which integrates an drug lens with square wave generator, leverages...
NMC532/artificial graphite cells using single crystal NMC532 active material can have excellent long term lifetime at 4.4 V and elevated temperature if appropriate electrolytes are used. However, developed earlier for these reported in the literature cannot support even C/2 rates during charging without unwanted lithium plating room temperature. This work is thus focused on development of new that yield higher rates. Ex-situ in-situ gas measurements, ultra-high precision coulometry,...
Organic sodium-ion batteries (OSIBs) are promising alternatives of inorganic lithium-ion batteries. The cathodes OSIBs still suffer from low capacity, poor rate performance, and cyclability. For the first time, we demonstrate large π-conjugated porous frameworks (CPFs) as for OSIBs, motivated by speculation that CPFs capable enhancing charge transport, facilitating ionic diffusion, inhibiting dissolution, well improving stability. based on obtained indeed delivered much better...
One way to lower the cost of lithium ion batteries using LiNixMnyCozO2 (NMC) or LiNi0.80Co0.15Al0.05O2 is Co content in positive electrode materials. This work systematically studied impact synthesis conditions on performance LiNixCoyAlzO2 (x ≥ 0.8, z ≤ 0.05 and x + y = 1) (NCA) with high Ni low content. The impacts oxygen flow rate, sintering temperature, initial Li/TM ratio time structural electrochemical properties NCA were studied. when impurity phases such as Li2CO3 Li5AlO4 appear...
This work studies the effect of Mg doping in LiMO2 (M = Ni, Ni+Al, Ni+Co+Al, Ni content >0.8) at a dopant level less than 5%. Synthesized materials were all single phase and contained no appreciable amount surface or bulk impurities. Structural electrochemical characterization was carried out to understand how affects whether presence Al Co influences effects Mg. All synthesized materials, even those without Co, found contain small Li layer. Increases material reduced initial capacity but...
First-principles computation of bulk O binding energies and Bader charges revealed the importance Li content on thermal decomposition charged high-nickel positive electrode materials for Li-ion batteries (LixNi1-yMyO2, 0 < x 1, y = 0, 0.05, M Al, Mg, Mn, Co). The impact individual dopants safety these was studied using thermogravimetric analysis (TGA) accelerating rate calorimetry (ARC) at two different states charge corresponding to with contents. It found that stability strongly depends...
Increasing the Ni content of a Ni-rich layered positive electrode material is one common way to improve energy density Li-ion cells but normally leads shorter cell lifetimes. Single crystalline materials have been shown lifetime by reducing degree degradation. This first study in two part series investigates synthesis Co-free single LiNi 0.95 Al 0.05 O 2 and 0.975 Mg 0.025 via two-step lithiation method. method consists step heating precursors at high temperatures with deficient Li grow...
Cation mixing in Li-based layered positive electrode materials has been reported to negatively affect the electrochemical performance and transport properties of intercalated Li. However, no previous reports have systematically correlated impact cation (Ni atoms Li layer) on transport. Herein, a series Li-deficient LNO (Li 1−x Ni 1+x O 2 ) with different amounts layers ranging from ca. 1.5%–6.0% was intentionally prepared by varying Li/Ni ratio during synthesis. An order magnitude decrease...
The sluggish kinetics of sulfur conversions have long been hindering the implementation fast and efficient electrochemistry in lithium-sulfur (Li-S) batteries. In this regard, herein unique chromium boride (CrB) is developed via a well-confined mild-temperature thermal reaction to serve as an advanced electrocatalyst. Its interstitial-alloy nature features excellent conductivity, while nano-lamination architecture affords abundant active sites for host-guest interactions. More importantly,...
High-nickel, cobalt-free, single-crystal positive electrode materials could provide the ultimate intersection of high-specific capacity, low cost, and long-lifetime in lithium-ion batteries. In this work, synthesis LiNiO 2 , LiNi 0.975 Mg 0.025 O 0.95 Al 0.05 is studied by dynamic XRD during heating, order to guide improvements procedures. A comparison Li CO 3 LiOH·H lithium sources shows that either can be used prepare these materials, but requires a higher temperature. doping shown...
Three fluorine-doped lithium nickel oxide samples series (LiNiO 2−x F x , LiNi 1−x Mg O ; Li 1+x/2 Ni 1−x/2 ) were prepared and investigated. It is suggested that fluorine was introduced into the lattice structure during calcination. As LiNiO percentage of (or Mg) in layer increases for > 0.05. However, adding excess sucessfully balances charge differential by doping therefore very little 2+ created layers remain “uncontaminated” other metals. Data from Li/LiNiO Li/LiNi Li/Li cells mirror...