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author:

Zhang, R. (Zhang, R..) [1] | Huang, J. (Huang, J..) [2] | Deng, W. (Deng, W..) [3] | Bao, J. (Bao, J..) [4] | Pan, Y. (Pan, Y..) [5] | Huang, S. (Huang, S..) [6] | Sun, C.-F. (Sun, C.-F..) [7]

Indexed by:

Scopus

Abstract:

A key challenge for potassium-ion batteries is to explore low-cost electrode materials that allow fast and reversible insertion of large-ionic-size K+. Here, we report an inorganic-open-framework anode (KTiOPO4), which achieves a reversible capacity of up to 102 mAh g−1 (307 mAh cm−3), flat voltage plateaus at a safe average potential of 0.82 V (vs. K/K+), a long lifespan of over 200 cycles, and K+-transport kinetics ≈10 times faster than those of Na-superionic conductors. Combined experimental analysis and first-principles calculations reveal a charge storage mechanism involving biphasic and solid solution reactions and a cell volume change (9.5 %) even smaller than that for Li+-insertion into graphite (≈10 %). KTiOPO4 exhibits quasi-3D lattice expansion on K+ intercalation, enabling the disintegration of small lattice strain and thus high structural stability. The inorganic open-frameworks may open a new avenue for exploring low-cost, stable and fast-kinetic battery chemistry. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keyword:

electrochemistry; fast kinetics; inorganic open-framework; low strain; potassium-ion batteries

Community:

  • [ 1 ] [Zhang, R.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
  • [ 2 ] [Huang, J.]College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
  • [ 3 ] [Deng, W.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
  • [ 4 ] [Bao, J.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
  • [ 5 ] [Pan, Y.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
  • [ 6 ] [Huang, S.]College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
  • [ 7 ] [Sun, C.-F.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China

Reprint 's Address:

  • [Sun, C.-F.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of SciencesChina

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Source :

Angewandte Chemie - International Edition

ISSN: 1433-7851

Year: 2019

Issue: 46

Volume: 58

Page: 16474-16479

1 2 . 9 5 9

JCR@2019

1 6 . 1 0 0

JCR@2023

ESI HC Threshold:184

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 57

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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