A5002162162- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Extraction and Separation Processes
- Respiratory Support and Mechanisms
- Hemodynamic Monitoring and Therapy
- Non-Invasive Vital Sign Monitoring
- Advanced Computational Techniques and Applications
- Laser Design and Applications
- Anesthesia and Sedative Agents
- Advanced Fiber Laser Technologies
- Nonlinear Photonic Systems
- Semiconductor Quantum Structures and Devices
- Advanced Memory and Neural Computing
- Cardiac Arrest and Resuscitation
- Nonlinear Waves and Solitons
- Electrical and Bioimpedance Tomography
- Intensive Care Unit Cognitive Disorders
- Embedded Systems and FPGA Design
- Advanced Algorithms and Applications
- Advanced battery technologies research
- Semiconductor Lasers and Optical Devices
Collaborative Innovation Center of Chemistry for Energy Materials
2022-2024
Xiamen University
2022-2024
Harbin Medical University
2024
Second Affiliated Hospital of Harbin Medical University
2024
Extending the charge cutoff voltage of cathode (e.g., LiCoO2) is a promising way to increase energy density Li-ion batteries, but critical challenges lie in threats triggered by structural distortion and an unstable electrode/electrolyte interface. The general approach enhance stability cathode/electrolyte interface (CEI) consists replacing decomposition or sacrificing sources carbonate solvents EC) with concentrated fluorinated electrolyte strategies. Herein, without following typical...
Element doping/substitution has been recognized as an effective strategy to enhance the structural stability of layered cathodes. However, abundant substitution studies not only lack a clear identification sites in material lattice, but rigid interpretation transition metal (TM)-O covalent theory is also sufficiently convincing, resulting proposals being dragged into design blindness. In this work, taking Li1.2Ni0.2Mn0.6O2 prototype, intense correlation between "disordered degree" (Li/Ni...
The working mechanism of LiCoO2 beyond 4.6 V presents complicated issues: (1) the ambiguous multistructural evolutions, (2) vague O-related anionic redox reactions (ARR) triggered by overlap Co–O bands, and (3) serious electrode–electrolyte interface stability challenges. intricate relationship among them turns into a classic "chicken egg" conundrum, leading to confusing evolution process LiCoO2. Herein, from an ingenious perspective combining stacking faults nonhomogeneous delithiation, we...
Understanding the interfacial hydrogen evolution reaction (HER) is crucial to regulate electrochemical behavior in aqueous zinc batteries. However, mechanism of HER related solvation chemistry remains elusive, especially time-dependent dynamic bond (H-bond) under an electric field. Herein, we combine situ spectroscopy with molecular dynamics simulation unravel structure. We find two critical change processes involving Zn-electroplating/stripping, including initial double layer establishment form H
Anode-free lithium metal batteries (AF-LMBs) can deliver the maximum energy density. However, achieving AF-LMBs with a long lifespan remains challenging because of poor reversibility Li+ plating/stripping on anode. Here, coupled fluorine-containing electrolyte, we introduce cathode pre-lithiation strategy to extend AF-LMBs. The AF-LMB is constructed Li-rich Li2Ni0.5Mn1.5O4 cathodes as Li-ion extender; large amount in initial charging process offset continuous consumption, which benefits...
Abstract Raising the charging cut‐off voltage of layered oxide cathodes can improve their energy density. However, it inevitably introduces instabilities regarding both bulk structure and surface/interface. Herein, exploiting unique characteristics high‐valence Nb 5+ element, a synchronous surface‐to‐bulk‐modified LiCoO 2 featuring Li 3 NbO 4 surface coating layer, Nb‐doped bulk, desired concentration gradient architecture through one‐step calcination is achieved. Such multifunctional...
Cathode electrolyte interphase (CEI) layers derived from oxidative decomposition can passivate the cathode surface and prevent its direct contact with electrolyte. The inorganics-dominated inner solid layer (SEL) organics-rich outer quasi-solid-electrolyte (qSEL) constitute CEI layer, both merge at junction without a clear boundary, which assures ionic-conducting electron-blocking properties. However, typical "wash-then-test" pattern of characterizations aiming microstructure would dissolve...
Abstract High‐nickel layered cathodes exhibit great promise in advancing high‐energy‐density batteries owing to their significant advantages high energy capacity and low cost, but they suffer severe structural interfacial deterioration during cycling, resulting safety risk reduced cycle life. Herein, drawing inspiration from the melting point infusion capability of Sb 2 Se 3 , a three‐pronged strategy aimed at simultaneously achieving coating on primary secondary particles surface, doping...
Abstract The intrinsic poor structural and thermal stability of high‐voltage layered cathodes are aggravated as the charging depth increases, which severely threatens cycle life safety battery. Herein, without modifying cathode itself, a simple economic blending strategy is introduced, an olivine‐LiCoO 2 blended featuring superior comprehensive performance (energy, power, cycle‐life, safety) at 4.65 V fabricated. strong bonding affinity olivine/LiCoO contact interface suppresses lattice O...
Compensating for the irreversible loss of limited active sodium (Na) is crucial enhancing energy density practical sodium-ion batteries (SIBs) full-cell, especially when employing hard carbon anode with initially lower coulombic efficiency. Introducing sacrificial cathode presodiation agents, particularly those that own potential anionic oxidation activity a high theoretical capacity, can provide additional sources compensating Na loss. Herein, Ni atoms are precisely implanted at sites within
Abstract As a potential candidate for next‐generation energy storage systems, Li–O 2 batteries (LOBs) with their attractive theoretical density have triggered great interest. However, tough issues of sluggish oxygen reduction reaction/oxygen evolution reaction (ORR/OER) kinetics, poor rechargeability, superoxide‐derived side reactions, and Li‐metal corrosion in LOBs limit practical applications. Herein, poly(2,2,2‐trifluoroethyl methacrylate) (PTFEMA) additive is introduced into the typical...
The initial Na loss limits the theoretical specific capacity of cathodes in Na-ion full cell applications, especially for Na-deficient P2-type cathodes. In this study, we propose a presodiation strategy to compensate cells, resulting higher and energy density. By employing an electrochemical approach, inject 0.32 excess active into Na0.67Li0.1Fe0.37Mn0.53O2 (NLFMO), aiming hard carbon (HC) inherent deficiency NLFMO. structure NLFMO cathode converts from P2 P'2 upon injection, without...
Abstract Developing sacrificial cathode prelithiation technology to compensate for active lithium loss is vital improving the energy density of lithium‐ion battery full‐cells. Li 2 CO 3 owns high theoretical specific capacity, superior air stability, but poor conductivity as an insulator, acting a promising challenging agent candidate. Herein, extracting trace amount Co from LiCoO (LCO), lattice engineering developed through substituting sites with and inducing defects obtain composite...
Abstract The high‐voltage induced undesirable surface passivation bilayer (cathode/electrolyte interface and cation‐densified phase) of LiCoO 2 inevitably leads to battery degradation. Herein, a continual/uniform enamel‐like olivine layer on is fabricated by employing high‐speed mechanical fusion method . suppresses interfacial side reactions tuning EC dehydrogenation, contributing an ultrathin stable cathode/electrolyte interface. strong bonding affinity between restrains both lattice...
In sodium-ion batteries (SIBs), the low initial coulombic efficiency (ICE) is commonly induced by irreversible phase conversion and difficult desodiation, especially on transition metal compounds (TMCs). Yet underlying physicochemical mechanism of poor reaction reversibility still a controversial issue. Herein, using in situ transmission electron microscopy X-ray diffraction, we demonstrate NiCoP@C caused rapid migration P carbon layer preferential formation isolated Na3 during discharge. By...
Benefiting from the highly reversible structural evolution of pre-lithiated Li-rich Li 2 Mn O 4 cathode, corresponding anode-free coin cell delivers a considerable 94.4% capacity retention after 40 cycles.
Extending the depth-of-charge (DoC) of layered oxide cathode presents an essential route to improve competitiveness Na-ion battery versus commercialized LiFePO
Ni-rich layered metal oxide cathodes and extreme fast charging (XFC) protocol have been introduced into lithium-ion batteries for the wider adoption of various electric devices. However, nickel intensifies electrolyte decomposition XFC poses challenges due to extremely high current density. Based on characterization paradigm established in our previous work, findings reveal a fundamental difference pathway under conditions compared enhanced reactivity between caused by Ni content....