polymer electrolytes for lithiumion batteries

... in nanocomposite solid polymer electrolytes. Key Eng Mater 2007, 336-338:526- 529. 8. Wei X, Shriver DF: Highly conductive polymer electrolytes containing rigid polymers. Chem Mater 1998, ... safe batteries possible and permits the development of thin batteries with design flexibility. Most of the efforts to date have focused on poly(ethylene oxide) [PEO] as the host material for ... Then, the solution was sonicated for 10 min and stirred for 24 h for dispersion. PS-based SPE was prepared by mixing the PS/LiCF 3 SO 3 and Al 2 O 3 solutions for 4 days. The solutions were...

Ngày tải lên: 20/06/2014, 23:20

... voltage of 5 kV. Elemental analysis Microanalysis was performed by Columbia Analytics (formerly Desert Analytics) in Tuc son, AZ. Samples (100 mg) for elemental analysis were prepared by lyo- philizing ... no toxicity being observed for CuCNPs containing 3, or 5 wt.% Cu. Discussion Synthesis and characterization of Cu-loaded polymeric nanoparticles A prototypical approach for sequestering and releasing metal ... chemotherapeutics [35,36]. We have therefore designed a carboxylate-functiona- lized, polymer- based nanoparticle capable of sequester- ing a prototypical metal, Cu 2+ , for the ultimate goal of delivering...

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... causes the polymer degradation [75- 83]. Figure 8 shows the generally accepted pathways of degradation and stabilization where radical formation is initiating and vital step for polymer degradation ... 4.3.1. Nanocomposites of biodegradable polymers 4.3.1.1.Biopolymers as matrix 4.3.1.2.Biopolymers as fillers 4.3.2. Nanocomposites of non-biodegradable polymers 4.4. Other factors 4.5. Advantages ... weight or polymeric stabilizers can be introduced. The polymeric stabilizers can be prepared by following three ways [73]; i) Grafting of stabilizer onto polymer 2 Key words: Polymer, ...

Ngày tải lên: 20/03/2014, 13:05

... of health system performance has been criticized for not using appropriate method of transformation and the z-scores transformation has been recommended (SPRG, 2001). For time – dependent ... way to prize the most performing countries and penalize the less performing ones. An advantage of this transformation is that, using the same percentile transformation for different years, any ... total exports. Therefore, to avoid adding up apples and pears, before going to the aggregation stage it is necessary to bring the indicators to the same standard, by transforming them in pure,...

Ngày tải lên: 05/05/2014, 13:58

... of 9 (page number not for citation purposes) Journal of Orthopaedic Surgery and Research Open Access Research article Biomechanical testing of a polymer- based biomaterial for the restoration ... techniques for avoiding re-herniation have been introduced to the market, with interesting first clinical results [20]. In combination with biomaterials, these techniques might prove to be useful for ... problems in order to be beneficial for the patient. In spinal surgery, preventive procedures to avoid common follow-up complications are conceivable in operations for disc herniation with predominant...

Ngày tải lên: 20/06/2014, 04:20

... Carbon-coated nanophase CaMoO 4 as anode material for Li ion batteries. Chem Mater 2004, 16:504. Figure 2 electrochemical performances of both electrodes were similar, as ... materials for lithium-ion batteries. Nature 2000, 407:496. 4. Taberna PL, Mitra S, Poizot P, Simon P, Tarascon JM: High rate capabilities Fe 3 O 4 -based Cu nano-architectured electrodes for lithium-ion ... Park JG, Sung YM, Chung KY, Cho WI, Kim DW: Enhanced cycling performance of Fe 0 /Fe 3 O 4 nanocomposite electrode for lithium-ion batteries. Nanotechnology 2009, 20:295205. 10. Ko YD, Kang...

Ngày tải lên: 20/06/2014, 21:20

... alternative [17,18]. However, this approach is also destructive [19,20], and the polymer surfaces are rapidly etched before the formation of surface hydroxyl groups is opti- mized. In this study, we developed ... method previously described [17] for anti-adhesion. Using the PDMS-coated AAO template as a master mold, a NOA63 polymer replica mold was prepared. The UV curable NOA63 polymer precursor was spread on ... After curing with UV radiation (l = 365 nm) for 1 h, the replica mold was peeled off, providing a surface nanopillar-patterned NOA63 polymer layer formed on a PET film (Figure 1b). F or the generation...

Ngày tải lên: 20/06/2014, 23:20

... of electrosprayed films can therefore be attributed to the conformation of the polymer. Keywords: organic light-emitting diodes; electrospray, polymer, conformation. Figure 1 Table 1. ... 120°C for 20 min. About 80-nm-thick emissive layer [EML] was formed by electrospray or spin-coating process and then annealed at 80°C for 30 min. A schematic diagram of the experimental setup for ... Qian et al. [19] reported a peak shift of PVK due to polymer conformation caused by the solvent effect. We believe that a similar polymer conformation effect results not only from the solvent,...

Ngày tải lên: 20/06/2014, 23:20

... temperature for 24 h. The precipitated solution was subsequently dried in an oven at 85°C to evaporate residual water, and the dried powders were ground well before heating at 600°C for 3 h to ... cathode materials for lithium secondary batteries. J Power Sources 2007, 167:178-184. 17. Yi TF, Li Cy, Zhu YR, Shu J, Zhu RS: Comparison of structure and electrochemical properties for 5 V LiNi 0.5 Mn 1.5 O 4 and ... subsequent cycling. On cycling the electrodes for 35 cycles, the capacities maintained by the latter sam- ples were far better t han those of the former. For instance, the capacity of the sample with...

Ngày tải lên: 20/06/2014, 23:20

... can be used as a promising high-performance electrode for Li-ion batteries. Introduction Cobalt oxide (CoO x ) is a high-capacity electrode mate- rial for Li-ion batteries with a theoretical capacity ... R ct and C ct values for the CuNFs@CoO x were much smal- ler than those for CoO x TF. A considerable change in the sum of R SEI and R ct from 344 Ω was observed for CoO x TF to 96 Ω for CuNFs@CoO x , ... CoO x . Consequently, this CuNFs@CoO x composite structure can be a promising candidate for use in the electrodes of high-performance Li-ion batteries. Abbreviations CuNFs@CoO x : copper nanofiber-networked cobalt...

Ngày tải lên: 21/06/2014, 04:20

... for Li ? , the cavities in hollow structured electrodes for Li-ion batteries may provide extra space for the storage of Li ? , beneficial for enhancing specific capacity. Furthermore, the void space ... disgusting obstacle for practical appli- cation of Si as the anode for Li-ion batteries. To overcome this drawback, two strategies have been proposed: using composite materials and forming nanostructured ... Li-ion batteries, which require high capacity, high rate capability, and high safety. The higher capacity and higher rate capability for hollow nanostructured anode materials than that for the...

Ngày tải lên: 21/06/2014, 07:20

... suitable for imprinting nanoscale features. Stiffer polymeric molds with a higher mechanical strength such as urethane- [12,13] and epoxide-based [14,15] polymer molds were therefore introduced. For ... inorganic molds and polymeric films is also problematic. For these reasons, several attempts have been made to use soft and flexible molds made from polymeric materials [8]. Various elastomeric polymers ... After curing with UV radiation (l = 365 nm) for 1 h, the replica mold was peeled off, providing a surface nanopillar-patterned NOA63 polymer layer formed on a PET film (Figure 1b). F or the generation...

Ngày tải lên: 21/06/2014, 17:20

... positive electrode for rechargeable lithium batteries. Adv Matter 2007, 19:657-660. 9. Débart A, Paterson AJ, Bao J, Bruce PG: a-MnO 2 nanowires: a catalyst for the O 2 electrode in rechargeable lithium batteries. ... Bruce PG: An O 2 cathode for rechargeable lithium batteries: the effect of a catalyst. J Power Sources 2007, 174:1177-1182. 13. Kraytsberg A, Ein-Eli Y: Review on Li-air batteries- opportunities, ... alkyl carbonate electrolytes. J Am Chem Soc 2011, 133:8040-8047. doi:10.1186/1556-276X-7-47 Cite this article as: Kim and Park: Catalytic properties of Co 3 O 4 nanoparticles for rechargeable Li/air batteries. ...

Ngày tải lên: 21/06/2014, 17:20

... cathode materials for lithium secondary batteries. J Power Sources 2007, 167:178-184. 17. Yi TF, Li Cy, Zhu YR, Shu J, Zhu RS: Comparison of structure and electrochemical properties for 5 V LiNi 0.5 Mn 1.5 O 4 and ... temperature for 24 h. The precipitated solution was subsequently dried in an oven at 85°C to evaporate residual water, and the dried powders were ground well before heating at 600°C for 3 h to ... EXPRESS Open Access Synthesis and characterization of integrated layered nanocomposites for lithium ion batteries Jihyeon Gim, Jinju Song, Hyosun Park, Jungwon Kang, Kangkun Kim, Vinod Mathew...

Ngày tải lên: 21/06/2014, 17:20

... doi:10.1021/ma021715k Nanoscale Res Lett (2009) 4:613–617 617 123 NANO EXPRESS Modification of Conductive Polymer for Polymeric Anodes of Flexible Organic Light-Emitting Diodes Guang-Feng Wang ặ Xiao-Ming Tao ... light-emitting diodes (FOLED) based the polymeric anodes have a comparable perfor- mance to those on indium–tin–oxide (ITO) anodes. Keywords PEDOT:PSS Á Polymeric anode Á Organic light-emitting ... prepared by using oxidative chemical or electrochemical polymerization methods is found to be insoluble and therefore difficult to process in thin-film form or other shapes [2]. Water soluble PEDOT:PSS...

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