Abstract
High energy density lithium metal batteries (LMBs) are promising next‐generation energy storage devices. However, the uncontrollable dendrite growth and huge volume change limit their practical applications. Here, a new Mg doped Li–LiB alloy with in situ formed lithiophilic 3D LiB skeleton (hereinafter called Li–B–Mg composite) is presented to suppress Li dendrite and mitigate volume change. The LiB skeleton exhibits superior lithiophilic and conductive characteristics, which contributes to the reduction of the local current density and homogenization of incoming Li+ flux. With the introduction of Mg, the composite achieves an ultralong lithium deposition/dissolution lifespan (500 h, at 0.5 mA cm−2) without short circuit in the symmetrical battery. In addition, the electrochemical performance is superior in full batteries assembled with LiCoO2 cathode and the manufactured composite. The currently proposed 3D Li–B–Mg composite anode may significantly propel the advancement of LMB technology from laboratory research to industrial commercialization.
Highlights
Introduction one is the formation ofLi dendrite, which is the main cause for internal short circuit, decreased cycle life expectancy andThe advent of lithium ion batteries (LIBs) has significantly low Coulombic efficiency.[4,5] Besides, the irreversible reaction mitigated the crisis of fossil fuels[1] and they have become between Li and nonaqueous electrolyte consumes large an integral part of our modern life by ubiquitously powering amount of Li and electrolyte.[6,7] Overall, the development of Li various of modern electronics such as mobile phones, laptops, anode faces enormous challenges.electric vehicles (EVs), unmanned aircraft, etc
The Breakthroughs in improving the electrochemical performance state-of-the-art LIBs dominating the market can hardly satisfy of Li metal anode may bring a renaissance of the lithium metal the soaring need for next-generation energy storage devices battery (LMB) technology
When Li is electrochemically dissolved, the skeleton maintains the integrity of the composite anode while in the reverse process it regulates the electrochemical deposition of Li and inhibits dendrite formation
Summary
Introduction one is the formation ofLi dendrite, which is the main cause for internal short circuit, decreased cycle life expectancy andThe advent of lithium ion batteries (LIBs) has significantly low Coulombic efficiency.[4,5] Besides, the irreversible reaction mitigated the crisis of fossil fuels[1] and they have become between Li and nonaqueous electrolyte consumes large an integral part of our modern life by ubiquitously powering amount of Li and electrolyte.[6,7] Overall, the development of Li various of modern electronics such as mobile phones, laptops, anode faces enormous challenges.electric vehicles (EVs), unmanned aircraft, etc. The irreversible reaction mitigated the crisis of fossil fuels[1] and they have become between Li and nonaqueous electrolyte consumes large an integral part of our modern life by ubiquitously powering amount of Li and electrolyte.[6,7]. The development of Li various of modern electronics such as mobile phones, laptops, anode faces enormous challenges. The Breakthroughs in improving the electrochemical performance state-of-the-art LIBs dominating the market can hardly satisfy of Li metal anode may bring a renaissance of the lithium metal the soaring need for next-generation energy storage devices battery (LMB) technology.
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