Three-Dimensional Double-Walled Ultrathin Graphite Tube Conductive Scaffold with Encapsulated Germanium Nanoparticles as a High-Areal-Capacity and Cycle-Stable Anode for Lithium-Ion Batteries

Abstract

The demand for lithium-ion batteries with both high power and high-energy density has attracted widespread attention as energy-storage devices for the increasing demand of consumer electronics, electric vehicles, and grid-scale storage. However, the fabrication of an advanced electrode architecture with high areal capacity, excellent cycling stability, and superior rate performance remains a long-term challenge in the development of advanced electrochemical energy-storage devices. Herein, we design an effective and general strategy to spontaneously encapsulate Ge nanoparticles into a three-dimensional double hydrophilic N-doped ultrathin graphite/void/hydrophobic ultrathin graphite tube network (Ge@3D-DHGT) with control over the position for large specific capacity (1338 mA h g–1), high rate performance (752 mA h g–1 at 40 C), and superior cycling stability (up to 1000 cycles). Toward the practical application, the as-prepared Ge@3D-DHGT electrode showed a large areal capacity (10 mA h cm–2 under 8 mA cm–2), which provides a highly promising anode with both high capacity and high rate performance. Importantly, this work provides an approach to fabricate high-areal-capacity anodes with long cycling stability and rapid charge–discharge properties with practical applications in advanced rechargeable batteries.

Germanene Nanosheets: Achieving Superior Sodium‐Ion Storage via Pseudointercalation Reactions

“…As one of the most promising anode materials for rechargeable alkali ion batteries, germanium (Ge) has been widely studied in LIBs due to its excellent electrical conductivity and considerable storage capacity via the reversible alloying-dealloying reaction. [4][5][6][7][8][9] High retention of capacity and good rate capability have been reported for LIB anodes. Intuition based on experience suggests that Ge would also be suitable as an anode material for NIBs.…”

Investigation of performance of cobalt oxide (CoO) and titanium dioxide (TiO2) attached to carbon nanotube (6, 0) as electrode of metal‐ion batteries: A theoretical study

“…TS and the T = 298.15 K). The cell voltage (V cell ) value of main reaction in anodes of metal-ion battery is calculated as follow: [43][44][45][46][47] The ΔE of adsorption of oxides on CNT is calculated as follow:…”

In-situ construction of conducting alloy interphase towards modulating Li-ion storage kinetics

“…Rechargeable lithium-ion batteries, as an important power supplier of electric vehicles (EVs), have received increasing attention due to their multi-fold advantages including low self-discharge and excellent cycling performance [1,2]. However, the high-cost of EVs and the undesired range anxiety set a higher request to LIBs, which should be characterized by higher energy density and less expensive feature [3,4].…”