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Mr Yajun Yue

 Yajun Yue

PhD Student

School of Biological and Chemical Sciences

www.qmul.ac.uk/sbcs/staff/yajunyue.html

Research

Research Interests

Project title: Structure and Conductivity In New Solid Electrolytes For IT-SOFCs

Summary: Significant research effort is going in to developing oxide ion conducting solid electrolytes that operate in the intermediate temperature range (500-700 deg C). Despite question marks over their stability electrolytes based on bismuth oxide show great promise in this area. The BIMEVOX family of solid electrolytes are a group of materials based on cation substitution in Bi4V2O11. They exhibit exceptionally high oxide ion conductivities at relativey low temperatures. However, there are still many problems with these materials when it comes to their processing. There are also many questions over the structural details that remain to be answered.  It is known that disorder in the structure is a major factor in the high conductivity exhibited in these systems. In many related systems co-substitution van lead to enhanced stability and materials processing. The present work will focus on new BIMEVOX compositions in order to obtain materials with superior stability and processing characteristics. Details of defect structure will be examined by total scattering methods in order to firmly establish the structure conductivity relationship. 

Supervisor Dr Isaac Abrahams

Publications of specific relevance to Materials Research

Publications

2021

2020

  • Dziegielewska A, Malys M, Wrobel W, Hull S, Yue Y, Krok F and Abrahams I (2020). Bi2V1-x(Mg0.25Cu0.25Ni0.25Zn0.25)xO5.5-3x/2: A high entropy dopant BIMEVOX. Elsevier  Solid State Ionics  vol. 360, 10.1016/j.ssi.2020.115543
  • Yan Z, Zhang D, Zhou X, Zhang M, Yue Y, Zhang L, Xue G, Luo H, Abrahams I and Yan H (2020). Phase transitions in RbPrNb2O7, a layer structured ferroelectric with a high Curie point. Elsevier  Acta Materialia  vol. 200, 971-979. 10.1016/j.actamat.2020.09.066
  • Zhang H, Giddens H, Yue Y, Xu X, Araullo-Peters V, Koval V, Palma M, Abrahams I, Yan H and Hao Y (2020). Polar nano-clusters in nominally paraelectric ceramics demonstrating high microwave tunability for wireless communication. Elsevier  Journal of The European Ceramic Society  10.1016/j.jeurceramsoc.2020.04.015

2019

  • Yue Y, Cao Z, Yang F, Wang J and Abrahams I (2019). Preparation of a novel anti-aggregation silica/zinc/graphene oxide nano-composite with enhanced adsorption capacity. Wiley  Chemistry: a European Journal  10.1002/chem.201903875