TY  - JOUR
A1  - Jia, He
A1  - Friebe, Christian
A1  - Schubert, Ulrich S.
A1  - Zhang, Xiaozhe
A1  - Quan, Ting
A1  - Lu, Yan
A1  - Gohy, Jean-Francois
T1  - Core-Shell Nanoparticles with a Redox Polymer Core and a Silica Porous Shell as High-Performance Cathode Material for Lithium-Ion Batteries
JF  - Energy technology : generation, conversion, storage, distribution
N2  - A facile and novel method for the fabrication of core-shell nanoparticles (PTMA@SiO2) based on a poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl methacrylate) (PTMA) core and a porous SiO2 shell is reported. The core-shell nanoparticles are further self-assembled with negatively charged multi-walled carbon nanotubes (MWCNTs), which results in the formation of a free-standing cathode electrode. The porous SiO2 shell not only effectively improves the stability of the linear PTMA redox polymer with low molar mass in organic electrolytes but also leads to the uniform dispersion of PTMA active units in the MWCNTs conductive network. The PTMA@SiO2@MWCNT composite electrode exhibits a specific capacity as high as 73.8 mAh g at 1 C and only 0.11% capacity loss per cycle at a rate of 2 C.
KW  - composite electrodes
KW  - core-shell nanoparticles
KW  - energy storage
KW  - lithium-ion batteries
KW  - redox polymers
Y1  - 2019
U6  - https://doi.org/10.1002/ente.201901040
SN  - 2194-4288
SN  - 2194-4296
VL  - 8
IS  - 3
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Ilic, Ivan K.
A1  - Tsouka, Alexandra
A1  - Perovic, Milena
A1  - Hwang, Jinyeon
A1  - Heil, Tobias
A1  - Löffler, Felix
A1  - Oschatz, Martin
A1  - Antonietti, Markus
A1  - Liedel, Clemens
T1  - Sustainable cathodes for Lithium-ion energy storage devices based on tannic acid-toward ecofriendly energy storage
JF  - Advanced sustainable systems
N2  - The use of organic materials with reversible redox activity holds enormous potential for next-generation Li-ion energy storage devices. Yet, most candidates are not truly sustainable, i.e., not derived from renewable feedstock or made in benign reactions. Here an attempt is reported to resolve this issue by synthesizing an organic cathode material from tannic acid and microporous carbon derived from biomass. All constituents, including the redox-active material and conductive carbon additive, are made from renewable resources. Using a simple, sustainable fabrication method, a hybrid material is formed. The low cost and ecofriendly material shows outstanding performance with a capacity of 108 mAh g(-1) at 0.1 A g(-1) and low capacity fading, retaining approximately 80% of the maximum capacity after 90 cycles. With approximately 3.4 V versus Li+/Li, the cells also feature one of the highest reversible redox potentials reported for biomolecular cathodes. Finally, the quinone-catecholate redox mechanism responsible for the high capacity of tannic acid is confirmed by electrochemical characterization of a model compound similar to tannic acid but without catecholic groups.
KW  - biomass
KW  - electrochemistry
KW  - energy storage
KW  - redox chemistry
KW  - sustainability
KW  - tannic acid
Y1  - 2020
U6  - https://doi.org/10.1002/adsu.202000206
SN  - 2366-7486
VL  - 5
IS  - 1
PB  - Wiley-VCH
CY  - Weinheim
ER  -