Production and characterization of CaNi₅-xMx compounds for metal hydride batteries

Download

index.pdf

Date

2012

Author

Muğan, Orkun

Metadata

Show full item record

Item Usage Stats

157
views

91
downloads

Ni - MH batteries have superior properties which are long cycle life, low maintenance, high power, light weight, good thermal performance and configurable design. Hydrogen storage alloys play a dominant role in power service life of a Ni - MH battery and determining the electrochemical properties of the battery. LaNi5, belonging to the CaCu5 crystal structure type, satisfy many of the properties. The most important property of LaNi5 is fast hydrogen kinetics. Recently, CaNi5, belonging to same crystal type, has taken some attention due to its low cost, higher hydrogen storage capacity, good kinetic properties. However, the main restriction of its use is its very low cycle life. The aim of the study is to obtain a more stable structure providing higher cycle life by the addition of different alloying elements. In this study, the effect of sixteen alloying elements (Mn, Sm, Sn, Al, Y, Cu, Si, Zn, Cr, Mg, Fe, Dy, V, Ti, Hf and Er) on cycle life was investigated. Sm, Y, Dy, Ti, Hf and Er were added for replacement of Ca and Mn, Sn, Al, Cu, Si, Zn, Cr, Mg, Fe and V were added for replacement of Ni. Alloys were produced by vacuum casting and heat treating followed by ball milling. The cells assembled, using the produced active materials as anode, which were cycled for charging and discharging. As a result, replacement of Ca with Hf, Ti, Dy and Er, and replacement of Ni with Si and Mn were observed to show better cycle durability rather than pure CaNi5.

Subject Keywords

Nickel, Nickel, Nickel alloys., Nickel-metal hydride batteries.

URI

http://etd.lib.metu.edu.tr/upload/12614676/index.pdf
https://hdl.handle.net/11511/21965

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Production and characterization of CaNi₅-xMx compounds for metal hydride batteries Öksüz, Berke; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2012) Ni - MH batteries have superior properties which are long cycle life, low maintenance, high power, light weight, good thermal performance and configurable design. Hydrogen storage alloys play a dominant role in power service life of a Ni - MH battery and determining the electrochemical properties of the battery. LaNi5, belonging to the CaCu5 crystal structure type, satisfy many of the properties. The most important property of LaNi5 is fast hydrogen kinetics. Recently, CaNi5, belonging to same crystal type,...
Production and characterization of carbon-silicon nanocomposite anode materials for secondary lithium batteries Miser, Burcu; Aydınol, Mehmet Kadri; Parlak, Mehmet; Department of Micro and Nanotechnology (2017) Amongst other anode materials, silicon has the highest capacity (for Li22Si5: 4200 mAh.g-1), whereas; the commonly used graphite has only a capacity of 320 mAh.g-1. Although this property of silicon makes it a worthwhile subject, there are technical issues which makes it difficult for commercial use. In this study, the aim is to investigate methods of producing silicon anode materials from a readily available powder via top down nano-particle forming methods for next generation lithium ion batteries which h...
A phase-field model for chemo-mechanical induced fracture in lithium-ion battery electrode particles MIEHE, C.; Dal, Hüsnü; SCHAENZEL, L. -M.; RAINA, A. (2016-06-01) Capacity fade in conventional Li-ion battery systems due to chemo-mechanical degradation during charge-discharge cycles is the bottleneck in high-performance battery design. Stresses generated by diffusion-mechanical coupling in Li-ion intercalation and deintercalation cycles, accompanied by swelling and shrinking at finite strains, cause micro-cracks, which finally disturb the electrical conductivity and isolate the electrode particles. This leads to battery capacity fade. As a first attempt towards a reli...
Synthesis of Graphene-MoS2 composite based anode from oxides and their electrochemical behavior Sarwar, Saira; Karamat, Shumaila; Saleem Bhatti, Arshad; Aydınol, Mehmet Kadri; Oral, Ahmet; Hassan, Muhammad Umair (2021-10-16) High energy storage capacity and longer life span make rechargeable Li-ion batteries the first choice in portable electronics. Here, a graphene-MoS2 composite material is investigated as a potential electrode material which enhances the electrochemical storage ability of the Li-ion batteries (LIBs). Graphene-MoS2 composite is synthesized from graphene oxide (GO), molybdenum trioxide and thiourea via hydrothermal route. Formation of graphene-MoS2 composite (molar ratio 1:2) is confirmed by X-ray diffraction ...
Synthesis of benzotriazole bearing donor acceptor type electroactive monomers towards high optical contrast and fast switching electrochromic materials Balan, Abidin; Toppare, Levent Kamil; Department of Chemistry (2009) Synthesis of new electroactive monomers are highly desired since these compounds can be utilized as active layers in many device applications such as ECDs, LEDs and solar cells. EDOT (3,4 ethylenedioxythiophene) and thiophene bearing polymers were also proven to be excellent candidates as electrochromic materials. Benzotriazole can be coupled to EDOT and thiophene to yield materials that can be polymerized to give donor acceptor type polymers. These materials are promising candidates as components in fast s...

Citation Formats

O. Muğan, “Production and characterization of CaNi₅-xMx compounds for metal hydride batteries,” M.S. - Master of Science, Middle East Technical University, 2012.