High rate hybrid MnO₂@CNT fabric anodes for Li-ion batteries: properties and a lithium storage mechanism study by in situ synchrotron X-ray scattering

Abstract

Unravelling lithium storage mechanism in high performance MnO2@CNT Li-ion battery anode by in situ X-ray synchrotron scattering.

Low-energy consumption, free-form capacitive deionization through nanostructured networks

“…A significant reduction of the pore volume (more than 50%) was detected in all the samples, attributed to pore blocking by the small-diameter particles (i.e. 21 nm), as also observed in related hybrids 35,36 Since one of the purposes of hybridising the MOx with CNT is to form a large interface for charge transfer processes, 25 it is expected that the interface forms largely at the expense of a drop in SSA. Overall, these hybrid electrodes preserve a high SSA accessible to water, while minimising the distance between the MOx external surface and the hybrid electrode interface.…”

“…Integration of the MOx can then be carried out in a controlled manner to maximise the electrolyte/electrode interface at minimal thickness of the poorly-conducting active phase, increasing efficiency of energy storage and conversion processes. 3,[23][24][25] Applying the atomic layer deposition (ALD) methodology, Feng et al…”

“…Integration of the MOx can then be carried out in a controlled manner to maximise the electrolyte/electrode interface at minimal thickness of the poorly-conducting active phase, increasing efficiency of energy storage and conversion processes. 3,[23][24][25] Applying the atomic layer deposition (ALD) methodology, Feng et al were able to prepare TiO2/CNT electrodes with a promising performance in terms of SAC, 5.1 mg•g -1 , ASAR, 0.5-1.5 mg•g -1 •min -1 , and energy consumption 3-6 Wh g -1 . 9 Other groups have favoured the use of fabrics of carbon nanotube fibres (CNTf) because of their combined electrical conductivity approaching copper, high toughness for handling and large electrochemical stability.…”

A Nanostructured Mo2C‐rGO Heterostructure as a stable Anode with ultra‐high capacity for Lithium‐Ion Battery**

“…[41] The higher surface area and higher active sites also allow more electrolyte accessibility into the electrode, which could be responsible for the higher specific capacity with increase of cycle number. [42] Morever, The coupling effect of multilayered heterosturucture with unique stacking of Mo 2 C and conducting reduced graphene oxide (rGO) reduces the ion diffusion path length. Mo 2 C-rGO has distinct structural arrangement with rich in defects, and also enriched active sites.…”

Opportunities of Aqueous Manganese‐Based Batteries with Deposition and Stripping Chemistry

“…Thereafter, the studies of MnO 2 and its composite materials in different rechargeable batteries have been increased exponentially. [ 62–71 ] Much effort has been devoted to the improvement of electrochemical performance of the aqueous Mn‐based batteries. Despite significant progress achieved over the past decades, the Mn‐based batteries still encountered fundamental issues that severely hindered their practical applications, such as low capacity, slow charge/discharge rate, and poor electrochemical stability.…”