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Ternary Salt–Solvent Electrolytes for 5 V-Class Anode-less Li-Metal Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-16 , DOI: 10.1021/acsenergylett.4c01435 Shubhadeep Pal 1 , Xiaodong Lin 1 , Petru Apostol 1 , Cosmin Ungureanu 2 , Da Tie 1 , Vasudeva Rao Bakuru 1 , Darsi Rambabu 1 , Nicolo′ Campagnol 1 , Andrii Kachmar 1 , Claude Poleunis 1 , Gabriella Barozzino-Consiglio 1 , Mihaela Buga 1, 2 , Alexandru Vlad 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-16 , DOI: 10.1021/acsenergylett.4c01435 Shubhadeep Pal 1 , Xiaodong Lin 1 , Petru Apostol 1 , Cosmin Ungureanu 2 , Da Tie 1 , Vasudeva Rao Bakuru 1 , Darsi Rambabu 1 , Nicolo′ Campagnol 1 , Andrii Kachmar 1 , Claude Poleunis 1 , Gabriella Barozzino-Consiglio 1 , Mihaela Buga 1, 2 , Alexandru Vlad 1
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The anode-less lithium-metal battery stands out, due to the lowest electrochemical reduction potential of lithium, high capacity, and lightweight nature, making it an optimal choice for constructing rechargeable metal batteries. We explored a distinctive ternary salt–solvent electrolyte formulation to demonstrate an anode-less 5 V Li-metal battery. Salt and solvent components were fine-tuned to synergistically alleviate aluminum dissolution and extend the oxidative stability up to 5.2 V (vs Li/Li+) with the Li-metal interface stabilization. In a 5 V-class cobalt-free LiNi0.5Mn1.5O4–Li anode-less cell, we attained 65 cycles within 20% capacity loss by keeping a 40% Li reserve, touted as a potential next-generation battery design. The dynamical behavior of lithium metal interfaces with cycling has been analyzed through a series of surface and bulk analysis techniques. We correlate the influence of salt formulation with the composition in the negative electrode and show that the LiF dense interface is the main cause of long cycle life.
中文翻译：
用于 5 V 级无阳极锂金属电池的三元盐溶剂电解质
无阳极锂金属电池由于锂的电化学还原电位最低、容量高且重量轻而脱颖而出，使其成为构建可充电金属电池的最佳选择。我们探索了一种独特的三元盐溶剂电解质配方来演示无阳极 5 V 锂金属电池。对盐和溶剂成分进行微调，以协同减轻铝的溶解，并将氧化稳定性提高至 5.2 V（相对于 Li/Li + ），并稳定锂金属界面。在 5 V 级无钴 LiNi 0.5 Mn 1.5 O 4 –Li 无阳极电池中，我们通过保持 40% 的锂储备，在 20% 的容量损失内实现了 65 个循环，被誉为潜在的下一代电池设计。通过一系列表面和本体分析技术，分析了锂金属界面与循环的动力学行为。我们将盐配方的影响与负极的成分相关联，结果表明 LiF 致密界面是长循环寿命的主要原因。
更新日期：2024-08-16
中文翻译：
用于 5 V 级无阳极锂金属电池的三元盐溶剂电解质
无阳极锂金属电池由于锂的电化学还原电位最低、容量高且重量轻而脱颖而出，使其成为构建可充电金属电池的最佳选择。我们探索了一种独特的三元盐溶剂电解质配方来演示无阳极 5 V 锂金属电池。对盐和溶剂成分进行微调，以协同减轻铝的溶解，并将氧化稳定性提高至 5.2 V（相对于 Li/Li + ），并稳定锂金属界面。在 5 V 级无钴 LiNi 0.5 Mn 1.5 O 4 –Li 无阳极电池中，我们通过保持 40% 的锂储备，在 20% 的容量损失内实现了 65 个循环，被誉为潜在的下一代电池设计。通过一系列表面和本体分析技术，分析了锂金属界面与循环的动力学行为。我们将盐配方的影响与负极的成分相关联，结果表明 LiF 致密界面是长循环寿命的主要原因。
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