کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332146 979032 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A taxonomy of apatite frameworks for the crystal chemical design of fuel cell electrolytes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
A taxonomy of apatite frameworks for the crystal chemical design of fuel cell electrolytes
چکیده انگلیسی

Apatite framework taxonomy succinctly rationalises the crystallographic modifications of this structural family as a function of chemical composition. Taking the neutral apatite [La8Sr2][(GeO4)6]O2 as a prototype electrolyte, this classification scheme correctly predicted that ‘excess’ oxygen in La9SrGe6O26.5 is tenanted in the framework as [La9Sr][(GeO4)5.5(GeO5)0.5]O2, rather than the presumptive tunnel location of [La9Sr][(GeO4)6]O2.5. The implication of this approach is that in addition to the three known apatite genera—A10(BO3)6X2, A10(BO4)6X2, A10(BO5)6X2—hybrid electrolytes of the types A10(BO3/BO4/BO5)6X2 can be designed, with potentially superior low-temperature ion conduction, mediated by the introduction of oxygen to the framework reservoir.

Apatite framework taxonomy succinctly rationalises the crystallographic modifications of this structural family as a function of chemical composition. Neutron diffraction identified that the excess oxygen in La9SrGe6O26.5 is tenanted in the framework as [La9Sr][(GeO4)5.5(GeO5)0.5]O2. The implication of this approach is that in addition to the three known apatite genera—A10(BO3)6X2, A10(BO4)6X2, A10(BO5)6X2—hybrid electrolytes of the types A10(BO3/BO4/BO5)6X2 can be designed.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 181, Issue 8, August 2008, Pages 1717–1722
نویسندگان
, , ,