TY - JOUR
T1 - Interfacial Design and Assembly for Flexible Energy Electrodes with Highly Efficient Energy Harvesting, Conversion, and Storage
AU - Ko, Yongmin
AU - Lee, Seokmin
AU - Kwon, Cheong Hoon
AU - Lee, Seung Woo
AU - Cho, Jinhan
N1 - Funding Information:
This work was supported by a National Research Foundation (NRF) of Korea funded by the Ministry of Education (2019R1A4A1027627; 2016M3A7B4910619; 2017R1A6A3A04003192). This work was also supported by the DGIST R&D Programs of the Ministry of Science and ICT of Korea (20‐ET‐08).
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/7/22
Y1 - 2021/7/22
N2 - Charge transfer between a conductive support and active materials as well as between neighboring active materials is one of the most critical factors in determining the performance of various electrodes in energy harvesting, conversion, and/or storage. Particularly, when preparing energy electrodes using conductive and/or electrochemically active nanoparticles (NPs), the bulky organic materials (i.e., ligand or polymeric binder) covering the NP surface seriously limit the charge transfer within the electrode, thereby restricting the energy storage or conversion efficiency. Furthermore, the flexibility and mechanical stability of the electrode have been considered important evaluation indices for flexible/wearable energy applications. In this regard, considerable research has been directed toward controlling the interfacial structure to enhance the charge transfer efficiency and toward incorporating functional materials into flexible/porous supports. This review describes the central progress in flexible electrodes for energy harvesting, conversion, and storage, along with the challenges in designing high-performance energy electrodes. In particular, layer-by-layer (LbL) assembly is analyzed, which is an ultrathin film fabrication technology that enables fine tuning of the interfacial structure for various electrode materials. It is shown how LbL assembly can be effectively applied to energy electrodes to obtain desired functionalities and improve the charge transfer efficiency of electrodes.
AB - Charge transfer between a conductive support and active materials as well as between neighboring active materials is one of the most critical factors in determining the performance of various electrodes in energy harvesting, conversion, and/or storage. Particularly, when preparing energy electrodes using conductive and/or electrochemically active nanoparticles (NPs), the bulky organic materials (i.e., ligand or polymeric binder) covering the NP surface seriously limit the charge transfer within the electrode, thereby restricting the energy storage or conversion efficiency. Furthermore, the flexibility and mechanical stability of the electrode have been considered important evaluation indices for flexible/wearable energy applications. In this regard, considerable research has been directed toward controlling the interfacial structure to enhance the charge transfer efficiency and toward incorporating functional materials into flexible/porous supports. This review describes the central progress in flexible electrodes for energy harvesting, conversion, and storage, along with the challenges in designing high-performance energy electrodes. In particular, layer-by-layer (LbL) assembly is analyzed, which is an ultrathin film fabrication technology that enables fine tuning of the interfacial structure for various electrode materials. It is shown how LbL assembly can be effectively applied to energy electrodes to obtain desired functionalities and improve the charge transfer efficiency of electrodes.
KW - energy conversion
KW - energy storage
KW - flexible electrodes
KW - interfacial assembly
KW - interfacial design
KW - ligand control
UR - http://www.scopus.com/inward/record.url?scp=85099339289&partnerID=8YFLogxK
U2 - 10.1002/aenm.202002969
DO - 10.1002/aenm.202002969
M3 - Review article
AN - SCOPUS:85099339289
VL - 11
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 27
M1 - 2002969
ER -