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Structural-electroc...
Structural-electrochemical relations in the aqueous copper hexacyanoferrate-zinc system examined by synchrotron X-ray diffraction
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- Renman, Viktor (author)
- Uppsala universitet,Strukturkemi
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- Ojwang, Dickson O. (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm University, Stockholm, Sweden
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- Valvo, Mario (author)
- Uppsala universitet,Strukturkemi
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- Gómez, Cesar Pay, Docent, 1974- (author)
- Uppsala universitet,Strukturkemi
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- Gustafsson, Torbjörn, 1949- (author)
- Uppsala universitet,Strukturkemi
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- Svensson, Gunnar (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm University, Stockholm, Sweden,Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK)
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English.
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In: Journal of Power Sources. - : Elsevier BV. - 0378-7753 .- 1873-2755. ; 369, s. 146-153
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Abstract
Subject headings
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- The storage process of Zn2+ in the Prussian blue analogue (PBA) copper hexacyanoferrate (Cu[Fe(CN)(6)](2/3)-nH(2) O-CuHCF) framework structure in a context of rechargeable aqueous batteries is examined by means of in operando synchrotron X-ray diffraction. Via sequential unit-cell parameter refinements of time-resolved diffraction data, it is revealed that the step-profile of the cell output voltage curves during repeated electrochemical insertion and removal of Zn2+ in the CuHCF host structure is associated with a non-linear contraction and expansion of the unit-cell in the range 0.36 < x < 1.32 for Znx/3Cu[Fe(CN)(6)](2/3)-nH(2)O. For a high insertion cation content there is no apparent change in the unit-cell contraction. Furthermore, a structural analysis with respect to the occupancies of possible Zn2+ sites suggests that the Fe(CN)(6) vacancies within the CuHCF framework play an important role in the structural-electrochemical behavior of this particular system. More specifically, it is observed that Zn2+ swaps position during electrochemical cycling, hopping between cavity sites to vacant ferricyanide sites.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- Prussian blue analogues
- Copper hexacyanoferrate
- Zinc
- Aqueous electrochemical energy storage
- In operando X-ray diffraction
- Synchrotron radiation
- Kemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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