Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Abstract

C skeleton to realize enhanced ultrafast Li ion storage is reported. Interlinked hydrothermalsynthesized N-LTO nanosheets are homogeneously decorated on the chemical vapor deposition (CVD) derived TiC/C nanowires forming binderfree N-LTO@TiC/C core-branch arrays. Positive advantages including large surface area, strong mechanical stability, and enhanced electronic/ ionic conductivity are obtained in the designed integrated arrays and rooted upon synergistic TiC/C matrix and N doping. The above appealing features can effectively boost kinetic properties throughout the N-LTO@TiC/C electrodes to realize outstanding high-rate capability at different working temperatures (143 mAh g −1 /10 C at 25 °C and 122 mAh g −1 /50 C at 50 °C) and notable cycling stability with a capacity retention of 99.3% after 10 000 cycles at 10 C. Moreover, superior high-rate cycling life is also demonstrated for the full cells with N-LTO@TiC/C anode and LiFePO 4 cathode. The dual strategy may provoke wide interests in fast energy storage areas and motivate the further performance improvement of power-type lithium ion batteries (LIBs).

Defect Promoted Capacity and Durability of N‐MnO2–x Branch Arrays via Low‐Temperature NH3 Treatment for Advanced Aqueous Zinc Ion Batteries

“…In this work, for the first time, we report a powerful method to synthesize N‐doped MnO 2– x (N‐MnO 2– x ) branch with rich oxygen vacancies on conductive TiC/C nanorods core forming N‐MnO 2– x @TiC/C core/branch arrays as robust cathodes for RAZIBs. TiC/C nanorods arrays are new popular conductive matrixes for electrochemical energy storage due to their high electrical conductivity, binder‐free characteristics, excellent chemical stability, and strong mechanical stability . In this design, N‐MnO 2– x nanosheets branch is uniformly coated on the CVD‐derived TiC/C nanorods core and endowed with improved electronic conductivity, excellent rigidity, and unique chemical stability.…”

Biological Metabolism Synthesis of Metal Oxides Nanorods from Bacteria as a Biofactory toward High‐Performance Lithium‐Ion Battery Anodes

“…The SEI layer formed on the surface of biometabolic α‐Fe 2 O 3 electrode consumes part of electrolyte during the initial cycles. Meanwhile, biometabolic α‐Fe 2 O 3 nanorods are fragmented into small pieces because of the conversion reaction mechanism, leading to generate fresh interfaces and form new SEI layers . Therefore, this activation process will not only cause the concentration change in electrolyte, but also enlarge the surface reaction resistance at the electrode/electrolyte interface.…”

High‐Throughput Production of Zr‐Doped Li4Ti5O12 Modified by Mesoporous Libaf3 Nanoparticles for Superior Lithium and Potassium Storage

“…Li 4 Ti 5 O 12 (LTO) is attracting much attention as a zero‐strain anode material for lithium‐ion batteries (LIBs) . Besides, due to the high voltage plateau of 1.55 V versus Li + /Li, the dendritic lithium growth can be inhibited .…”

“…The optimized materiali su sed as an advanced anode for both lithium-ion andp otassium-ion batteries, and good battery behavior including high-rate performance and high stability is achieved.Li 4 Ti 5 O 12 (LTO) is attracting much attentiona sazero-strain anode material for lithium-ion batteries (LIBs). [1,2] Besides, due to the high voltage plateau of 1.55 Vv ersusL i + /Li, the dendritic lithium growth can be inhibited. [3,4] Consequently,asapromising alternative to graphite, LTOc an achieve long cycle life and excellent safety.…”