Consequences of Combinatorial Studies of Positive Electrodes for Li-ion Batteries

Consequences of Combinatorial Studies of Positive Electrodes for Li-ion Batteries

4.11 - 1251 ratings - Source

Li-Co-Mn-Ni oxides have been of extreme interest as potential positive electrode materials for next generation Li-ion batteries. Though many promising materials have been discovered and studied extensively, much debate remains in the literature about the structures of these materials. There is no consensus as to whether the lithium-rich layered materials are single-phase or form a layered-layered composite on the few nanometer length-scales. Much of this debate came about because no phase diagrams existed to describe these systems under the synthesis conditions used to make electrode materials. Detailed in this thesis are the complete Li-Co-Mn-O and Li-Mn-Ni-O phase diagrams generated by way of the combinatorial synthesis of mg-scale samples at over five hundred compositions characterized with X-ray diffraction. Selected bulk samples were used to confirm that the findings are relevant to synthesis conditions used commercially. The results help resolve a number of points of confusion and contradiction in the literature. Amongst other important findings, the compositions and synthesis conditions giving rise to layered-layered nano-composites are presented and electrochemical results are used to show how better electrode materials can be achieved by making samples in the single phase-layered regions.Results of the Monte Carlo simulation for the transition metal layer with x = 0.5 in Li[Li(1aˆ’x)/3Cox Mn(2aˆ’2x)/3]O2 such that 50% of the atoms ... a The complete phase diagram obtained by quenching from 800 a—bC after heating in oxygen for 3 h.

Title:Consequences of Combinatorial Studies of Positive Electrodes for Li-ion Batteries
Author: Eric McCalla
Publisher:Springer Science & Business Media - 2014-04-11

You must register with us as either a Registered User before you can Download this Book. You'll be greeted by a simple sign-up page.

Once you have finished the sign-up process, you will be redirected to your download Book page.

How it works:
  • 1. Register a free 1 month Trial Account.
  • 2. Download as many books as you like (Personal use)
  • 3. Cancel the membership at any time if not satisfied.

Click button below to register and download Ebook
Privacy Policy | Contact | DMCA