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  4. Filled carbon nanotubes as anode materials for lithium-ion batteries
 
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2020
Journal Article
Title

Filled carbon nanotubes as anode materials for lithium-ion batteries

Abstract
Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices. (2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.
Author(s)
Thauer, Elisa
Kirchhoff Institute for Physics
Ottmann, Alexander
Kirchhoff Institute for Physics
Schneider, Philip
Kirchhoff Institute for Physics
Möller, Lucas
Kirchhoff Institute for Physics
Deeg, Lukas
Kirchhoff Institute for Physics
Zeus, Rouven
Kirchhoff Institute for Physics
Wilhelmi, Florian
Kirchhoff Institute for Physics
Schlestein, Lucas
Kirchhoff Institute for Physics
Neef, Christoph  orcid-logo
Fraunhofer-Institut für System- und Innovationsforschung ISI  
Ghunaim, Rasha
Leibniz Institute for Solid State and Materials Research; Palestine Polytechnic Univ.
Gellesch, Markus
Leibniz Institute for Solid State and Materials Research
Nowka, Christian
Leibniz Institute for Solid State and Materials Research
Scholz, Maik
Leibniz Institute for Solid State and Materials Research
Haft, Marcel
Leibniz Institute for Solid State and Materials Research
Wurmehl, Sabine
Leibniz Institute for Solid State and Materials Research; TU Dresden, Institute for Physics of Solids
Wenelska, Karolina
West Pomeranian Univ. of Technology, Nanomaterials Physicochemistry Department
Mijowska, Ewa
West Pomeranian Univ. of Technology, Nanomaterials Physicochemistry Department
Kapoor, Aakanksha
Indian Institute of Science Education and Research
Bajpai, Ashna
Indian Institute of Science Education and Research
Hampel, Silke
Leibniz Institute for Solid State and Materials Research
Klingeler, Rüdiger
Kirchhoff Institute for Physics; Centre for Advanced Materials Heidelberg
Journal
Molecules  
Open Access
DOI
10.24406/publica-r-265292
10.3390/molecules25051064
File(s)
N-618129.pdf (2.17 MB)
Rights
CC BY 4.0: Creative Commons Attribution
Language
English
Fraunhofer-Institut für System- und Innovationsforschung ISI  
Keyword(s)
  • filled carbon nanotubes

  • lithium-ion batteries

  • hybrid nanomaterials

  • anode material

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