fabrication of low-tortuosity ultrahigh-area-capacity

2020-8-6Welcome to the page for Patrick Grant Vesuvius Professor of Materials and the Processing of Advanced Materials research group at Oxford University Our research takes place at the interface between advanced materials and manufacturing Particular applications include electrodes for energy storage and advanced metallic alloys for power generation Moreover the low-tortuosity and less sulfur-philic SeVGA-3k electrode showed much lower capacity of 409 233 and 152 mAh g −1 at current densities of 1 6 3 2 and 8 mA cm −2 respectively along with fast capacity decay (34 2% loss Figure 3D) and severe electrode passivation (cathodic resistance increase from 11 1 to 150 Ω Figure S17

Vertical graphenes grown on a flexible graphite paper as

2020-5-25ultrahigh theoretical capacity (3860 mAh g-1) low density (0 59 g cm-3) and the lowest reduction potential (-3 04 V versus the standard hydrogen electrode) [3] However the safety hazards and low Coulombic efficiency (CE) of Li metal anode (LMA) triggered by dendrite growth and continuous side reactions need to be addressed before its

High-capacity low-tortuosity and channel-guided lithium metal anode Proceedings of the National Academy of Sciences of the United States of America PMID 28320936 DOI: 10 1073/pnas 1618871114 : 0 44: 2017: Han X Yang Z Zhao B Zhu S Zhou L Dai J Kim JW Liu B Connell JW Li T Yang B Lin Y Hu L Compressible Dense Three-Dimensional

2019-9-2Magnetically aligned Fe 3 O 4 ‐containing oil droplets are used as pore formers to produce highly oriented low‐tortuosity pore channels that address transport limitations of thick electrodes (400 m thickness) with ultrahigh areal capacity (≈14 mAh cm −2 vs 2–4 mAh cm −2 for conventional Li ion) This method opens new opportunities for developing high energy‐density or fast

2014-6-19Graphene has attracted considerable interest over recent years due to its intrinsic mechanical thermal and electrical properties Incorporation of small quantity of graphene fillers into polymer can create novel nanocomposites with im- proved structural and functional properties This review introduced the recent progress in fabrication properties and potential applications of graphene

1 article{osti_1498274 title = {Fabrication of Low-Tortuosity Ultrahigh-Area-Capacity Battery Electrodes through Magnetic Alignment of Emulsion-Based Slurries} author = {Li Linsen and Erb Randall M and Wang Jiajun and Wang Jun and Chiang Yet -Ming} abstractNote = {High energy–density low–cost batteries are critically important to a variety of applications ranging from

Designing ionic channels in novel carbons for

As the perfect carbon shows low activity for the adsorption and reactions of ions to some extent a wide range of studies have focused on the functionalization of sp 2-hybridized carbons e g by engineering defects doping and so on to significantly improve the capacity of supercapacitors [46 47] and batteries

Linsen Li Randall M Erb Jiajun Wang Jun Wang and Yet‐Ming Chiang Fabrication of Low‐Tortuosity Ultrahigh‐Area‐Capacity Battery Electrodes through Magnetic Alignment of Emulsion‐Based Slurries Advanced Energy Materials 9 2 (2018)

High-capacity low-tortuosity and channel-guided lithium metal anode Proceedings of the National Academy of Sciences of the United States of America PMID 28320936 DOI: 10 1073/pnas 1618871114 : 0 44: 2017: Han X Yang Z Zhao B Zhu S Zhou L Dai J Kim JW Liu B Connell JW Li T Yang B Lin Y Hu L Compressible Dense Three-Dimensional

2019-3-13Hierarchically porous nanosheets-constructed 3D carbon network for ultrahigh-capacity supercapacitor and battery anode Ying-Ying Wang 1 2 Bao-Hua Hou 3 Qiu-Li Ning 3 the porosity and the surface area were measured using with an ASAP 2020 instrument at 77 K Bruker D8 ADVANCE diffractometer with a Cu K low-tortuosity

As the perfect carbon shows low activity for the adsorption and reactions of ions to some extent a wide range of studies have focused on the functionalization of sp 2-hybridized carbons e g by engineering defects doping and so on to significantly improve the capacity of supercapacitors [46 47] and batteries

2014-3-13Observed for Low Tortuosity Microstructures 0 20 40 60 80 100 120 140 160 0 01 0 1 1 10 Specific Capacity (mAh/g) C-rate 3 4 0 40 80 120 160 No add 5% Ethanol 5% Sugar #2 1C 3C Specific Capacity (mAh/g) Voltage (V) C/10 Sintered with no pore alignment 74 % dense 63vol% dense 50μm 50μm Freeze-cast and sintered Electrodes Gen 2 Gen 1

Such a cathode retains high specific capacity of around 120 mAh g −1 at ultrahigh current density of 400 A g −1 (charged in 1 1 s) with 91 7% retention after 250 000 cycles surpassing all the previous batteries in terms of rate capability and cycle life The assembled aluminum-graphene battery works well within a wide temperature range of

2020-5-25ultrahigh theoretical capacity (3860 mAh g-1) low density (0 59 g cm-3) and the lowest reduction potential (-3 04 V versus the standard hydrogen electrode) [3] However the safety hazards and low Coulombic efficiency (CE) of Li metal anode (LMA) triggered by dendrite growth and continuous side reactions need to be addressed before its

Designing ionic channels in novel carbons for

As the perfect carbon shows low activity for the adsorption and reactions of ions to some extent a wide range of studies have focused on the functionalization of sp 2-hybridized carbons e g by engineering defects doping and so on to significantly improve the capacity of supercapacitors [46 47] and batteries

2020-2-5Alternating current (AC) line filters have been widely used to smooth the leftover AC ripples on direct current voltage Currently available commercial aluminum electrolytic capacitors (AECs) are primarily used for this application However the bulky volume and low capacitance of AECs have become incompatible with the rapidly developed intelligent electronic devices and industry dynamics

2019-4-2Ultrahigh Energy Density • Develop scalable process for fabrication of thick high area capacity low‐tortuosity cathodes and anodes Scalable methods for fabricating pore structures with low tortuosity normal to the electrode plane are developed

However a general and scalable fabrication method for low‐tortuosity electrodes is currently lacking Here an emulsion‐based magnetic‐alignment approach to producing thick electrodes (400 m thickness) with ultrahigh areal capacity (up to ≈14 mAh cm

Microscale batteries can deliver energy at the actual point of energy usage providing capabilities for miniaturizing electronic devices and enhancing their performance Here we demonstrate a high-performance microbattery suitable for large-scale on-chip integration with both microelectromechanical and complementary metal-oxide–semiconductor (CMOS) devices Enabled by a 3D holographic