TY  - JOUR
AU  - Sougrati, Moulay T.
AU  - Darwiche, Ali
AU  - Liu, Xiaohiu
AU  - Mahmoud, Abdelfattah
AU  - Jouen, Samuel
AU  - Monconduit, Laure
AU  - Dronskowski, Richard
AU  - Stievano, Lorenzo
AU  - Hermann, Raphael
TI  - Transition-Metal Carbodiimides as Molecular Negative Electrode Materials for Lithium- and Sodium-Ion Batteries with Excellent Cycling Properties
JO  - Angewandte Chemie / International edition
VL  - 55
IS  - 16
SN  - 1433-7851
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2016-02076
SP  - 5090–5095
PY  - 2016
AB  - We report evidence for the electrochemical activity of transition-metal carbodiimides versus lithium and sodium. In particular, iron carbodiimide, FeNCN, can be efficiently used as negative electrode material for alkali-metal-ion batteries, similar to its oxide analogue FeO. Based on 57Fe Mössbauer and infrared spectroscopy (IR) data, the electrochemical reaction mechanism can be explained by the reversible transformation of the Fe−NCN into Li/Na−NCN bonds during discharge and charge. These new electrode materials exhibit higher capacity compared to well-established negative electrode references such as graphite or hard carbon. Contrary to its oxide analogue, iron carbodiimide does not require heavy treatments (such as nanoscale tailoring, sophisticated textures, or coating) to obtain long cycle life with current density as high as 9 A g−1 for hundreds of charge–discharge cycles. Similar to the iron compound, several other transition-metal carbodiimides Mx(NCN)y with M=Mn, Cr, Zn can cycle successfully versus lithium and sodium. Their electrochemical activity and performance open the way to the design of a novel family of anode materials.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000374496100041
C6  - pmid:26989882
DO  - DOI:10.1002/anie.201600098
UR  - https://juser.fz-juelich.de/record/388843
ER  -