scholarly journals Improving the Dispersion Behavior of Organic Components in Water-Based Electrode Dispersions for Inkjet Printing Processes

2021 ◽  
Vol 11 (5) ◽  
pp. 2242
Author(s):  
Cara G. Kolb ◽  
Maja Lehmann ◽  
Jana-Lorena Lindemann ◽  
Andreas Bachmann ◽  
Michael F. Zaeh
Keyword(s):  
Carbon Black ◽  
Inkjet Printing ◽  
Empirical Studies ◽  
Lithium Ion ◽  
Water Based ◽  
Graphite Nanoparticles ◽  
Organic Electrode ◽  
Increasing Demand ◽  
Triton X ◽  
Printing Processes

Water-based processing of electrodes is associated with an enhanced environmental footprint for lithium-ion battery (LIB) production in conjunction with reduced costs. This trend is accompanied by an increasing demand for electrode dispersion processing in inkjet printing. However, most of the dispersion components show a low inherent dispersibility with poor stability in aqueous formulations. This is particularly important when it comes to qualifying electrode dispersions for use in inkjet printing, since the effect of agglomeration and sedimentation effects must be effectively prevented. Therefore, additives are needed to improve the dispersive behavior. This paper analyzes the suitability of dispersants for organic electrode components, in particular graphite and carbon black. An empirical approach was devised on the basis of comprehensive theoretical considerations. Empirical investigations revealed that the utilization of polyvinylpyrrolidone (PVP) favored the enhanced stabilization of graphite nanoparticles. The addition of Triton X-100 (TX-100) resulted in an improved stabilization of carbon black. Based on these empirical studies, a methodology was derived, which supports the application of suitable dispersants in printable dispersions.

Physician Reentry into Clinical Practice: Regulatory Challenges

2011 ◽  
Vol 97 (1) ◽  
pp. 10-15 ◽  
Author(s):  
Gretchen P. Kenagy ◽  
Barbara S. Schneidman ◽  
Barbara Barzansky ◽  
Claudette E. Dalton ◽  
Carl A. Sirio ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Empirical Studies ◽  
Clinical Activity ◽  
Central Importance ◽  
Regulatory Policies ◽  
Physician Competence ◽  
Leave Of Absence ◽  
Increasing Demand ◽  
State Medical Boards ◽  
Regulatory Challenges

ABSTRACT Physician reentry to clinical practice is fast becoming recognized as an issue of central importance in discussions about the physician workforce. While there are few empirical studies, existing data show that increasing numbers of physicians take a leave of absence from practice at some point during their careers; this trend is expected to continue. The process of returning to clinical practice is coming under scrutiny due to the public's increasing demand for transparency regarding physician competence. Criteria for medical licensure often do not include an expectation of ongoing clinical activity. Physicians who maintain a license but do not practice for a period of time, therefore, may be reentering the workforce with unknown competency to practice. This paper: (1) presents survey data on current physician reentry policies of state medical boards; (2) discusses the findings from the survey within the context of regulatory challenges that impact physician-reentry; and (3) offers recommendations to facilitate the development of comprehensive, coordinated regulatory policies on physician reentry.

scholarly journals Synthesis, Structure and Diffusion Pathways of Fast Lithium-Ion Conductors in the Polymorphs α- and β-Li8SnP4

2021 ◽  
Author(s):  
Thomas F Fässler ◽  
Stefan Strangmüller ◽  
Henrik Eickkhoff ◽  
Wilhelm Klein ◽  
Gabriele Raudaschl-Sieber ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Lithium Ion ◽  
Conducting Materials ◽  
Increasing Demand ◽  
Battery Technology ◽  
Lithium Ion Conductors ◽  
And Diffusion ◽  
Ion Conductors

The increasing demand for a high-performance and low-cost battery technology promotes the search for Li+-conducting materials. Recently, phosphidotetrelates and aluminates were introduced as an innovative class of phosphide-based Li+-conducting materials...

scholarly journals Global Warming Potential of a New Waterjet-Based Recycling Process for Cathode Materials of Lithium-Ion Batteries

Batteries ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 29
Author(s):  
Leonard Kurz ◽  
Mojtaba Faryadras ◽  
Ines Klugius ◽  
Frederik Reichert ◽  
Andreas Scheibe ◽  
...  
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Waste Treatment ◽  
Raw Materials ◽  
Lithium Ion ◽  
Primary Data ◽  
Recycling Process ◽  
Use Of Resources ◽  
Mechanical Removal ◽  
Increasing Demand

Due to the increasing demand for battery electric vehicles (BEVs), the need for vehicle battery raw materials is increasing. The traction battery (TB) of an electric vehicle, usually a lithium-ion battery (LIB), represents the largest share of a BEV’s CO2 footprint. To reduce this carbon footprint sustainably and to keep the raw materials within a closed loop economy, suitable and efficient recycling processes are essential. In this life cycle assessment (LCA), the ecological performance of a waterjet-based direct recycling process with minimal use of resources and energy is evaluated; only the recycling process is considered, waste treatment and credits for by-products are not part of the analysis. Primary data from a performing recycling company were mainly used for the modelling. The study concludes that the recycling of 1 kg of TB is associated with a global warming potential (GWP) of 158 g CO2 equivalents (CO2e). Mechanical removal using a water jet was identified as the main driver of the recycling process, followed by an air purification system. Compared to conventional hydro- or pyrometallurgical processes, this waterjet-based recycling process could be attributed an 8 to 26 times lower GWP. With 10% and 20% reuse of recyclate in new cells, the GWP of TBs could be reduced by 4% and 8%, respectively. It has been shown that this recycling approach can be classified as environmentally friendly.

Increased residual lithium compounds guided design for green recycling of spent lithium-ion cathodes

2021 ◽  
Author(s):  
Min Fan ◽  
Xin Chang ◽  
Yu-Jie Guo ◽  
Wan-Ping Chen ◽  
Ya-Xia Yin ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Closed Loop ◽  
Lithium Ion ◽  
Green Water ◽  
Lithium Compounds ◽  
Water Based

Based on the increased residual lithium compounds of the degraded cathode, a green water-based strategy is designed for achieving closed-loop recycling of spent lithium-ion batteries.

Effects of carbon black on the electrochemical performances of SiO anode for lithium-ion capacitors

2021 ◽  
Vol 499 ◽  
pp. 229936
Author(s):  
Xianzhong Sun ◽  
Linbin Geng ◽  
Sha Yi ◽  
Chen Li ◽  
Yabin An ◽  
...  
Keyword(s):  
Carbon Black ◽  
Lithium Ion ◽  
Electrochemical Performances

Water-based manufacturing of lithium ion battery for life cycle impact mitigation

CIRP Annals ◽  
2021 ◽  
Author(s):  
Chris Yuan ◽  
Huajun Cao ◽  
Kang Shen ◽  
Yelin Deng ◽  
Dan Zeng ◽  
...  
Keyword(s):  
Life Cycle ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Impact Mitigation ◽  
Water Based ◽  
Life Cycle Impact

Recent progress in rechargeable lithium batteries with organic materials as promising electrodes

2016 ◽  
Vol 4 (19) ◽  
pp. 7091-7106 ◽  
Author(s):  
Jian Xie ◽  
Qichun Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Batteries ◽  
Recent Progress ◽  
Electrode Materials ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Positive Electrode ◽  
Rechargeable Lithium Batteries ◽  
Organic Electrode ◽  
Negative Electrode Materials

Different organic electrode materials in lithium-ion batteries are divided into three types: positive electrode materials, negative electrode materials, and bi-functional electrode materials, and are further discussed.

scholarly journals Electromagnetic Interference Shielding Efficiency in the Range 8.2-12.4 GHz of Polymer Composites with Dispersed Carbon Nanoparticles

2011 ◽  
Vol 14 (1) ◽  
pp. 55 ◽  
Author(s):  
Anna V. Gubarevich ◽  
Kazuki Komoriya ◽  
Osamu Odawara
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Black ◽  
Polymer Composites ◽  
Electromagnetic Interference ◽  
Carbon Nanoparticles ◽  
Hot Press ◽  
Frequency Range ◽  
Electromagnetic Interference Shielding ◽  
X Band ◽  
Graphite Nanoparticles

In the present work, electromagnetic interference shielding properties of polymer composites with dispersed cup-stacked carbon nanotubes, graphite nanoparticles and carbon black were investigated. The polymer composites with carbon nanoparticles content from 1 to 5 w% were successfully prepared by the coagulation method, and composite sheets with thickness from 0.25 to 0.77 mm were formed by the hot press technique. The electromagnetic interference shielding efficiency measured in the frequency range of 8.2~12.4 GHz (X-band) of cup-stacked carbon nanotubes/polymer composite was considerably higher than that of carbon black and graphite nanoparticles polymer composites at the same contents of carbon nanoparticles, and contribution of absorption to the shielding efficiency was found to be higher than that of reflection.

The Effect of Gadolinium Ion Doping on Electronic Conductivity of LiFePO4/C

2020 ◽  
Vol 860 ◽  
pp. 69-74
Author(s):  
Iman Rahayu ◽  
Engela Evy Ernawati ◽  
Atiek Rostika Noviyanti ◽  
Yusra Linda ◽  
Diana Rakhmawaty ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Carbon Black ◽  
Carbothermal Reduction ◽  
Carbon Coating ◽  
Electronic Conductivity ◽  
Synthesis Method ◽  
Lithium Ion ◽  
The Poor ◽  
Ion Doping ◽  
High Theoretical Capacity

In the recent years, LiFePO4 has been widely developed as a cathode for lithium ion batteries because it has high theoretical capacity (170 mAh/g), good stability and is also environmentally friendly. However, the poor electronic conductivity (~10-9 S/cm) and low diffusion coefficient of lithium ion (~10-15-10-14 cm2/s) are limiting its application. Some solutions to overcome this problem are carbon coating and doping metal ions. This study aims to determine the effect of Gd3+ ion doping on the electronic conductivity of LiFePO4/C. The synthesis method was used is carbothermal reduction with Fe2O3, Gd2O3, LiH2PO4 and carbon black reagents. The synthesized LiFe1-xGdxPO4/C was characterized using XRD, SEM-EDS, and four point probes. The results obtained showed that gadolinium ion doping increased the conductivity of LiFePO4/C from 1.8952 x10-6 to 8.69x10-6 Scm-1 using 0.07 mol ion Gd3+.

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