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Highly soluble organic nitrate additives for practical lithium metal batteries
Carbon Energy ( IF 19.5 ) Pub Date : 2022-11-15 , DOI: 10.1002/cey2.283
Zhe Wang 1, 2, 3 , Li‐Peng Hou 4 , Zheng Li 4 , Jia‐Lin Liang 1, 3 , Ming‐Yue Zhou 4 , Chen‐Zi Zhao 4 , Xiaoyuan Zeng 5 , Bo‐Quan Li 1, 3 , Aibing Chen 2 , Xue‐Qiang Zhang 1, 3 , Peng Dong 5 , Yingjie Zhang 5 , Jia‐Qi Huang 1, 3 , Qiang Zhang 4
Carbon Energy ( IF 19.5 ) Pub Date : 2022-11-15 , DOI: 10.1002/cey2.283
Zhe Wang 1, 2, 3 , Li‐Peng Hou 4 , Zheng Li 4 , Jia‐Lin Liang 1, 3 , Ming‐Yue Zhou 4 , Chen‐Zi Zhao 4 , Xiaoyuan Zeng 5 , Bo‐Quan Li 1, 3 , Aibing Chen 2 , Xue‐Qiang Zhang 1, 3 , Peng Dong 5 , Yingjie Zhang 5 , Jia‐Qi Huang 1, 3 , Qiang Zhang 4
Affiliation
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The stability of lithium metal anodes essentially dictates the lifespan of high-energy-density lithium metal batteries. Lithium nitrate (LiNO3) is widely recognized as an effective additive to stabilize lithium metal anodes by forming LiNxOy-containing solid electrolyte interphase (SEI). However, its poor solubility in electrolytes, especially ester electrolytes, hinders its applications in lithium metal batteries. Herein, an organic nitrate, isosorbide nitrate (ISDN), is proposed to replace LiNO3. ISDN has a high solubility of 3.3 M in ester electrolytes due to the introduction of organic segments in the molecule. The decomposition of ISDN generates LiNxOy-rich SEI, enabling uniform lithium deposition. The lifespan of lithium metal batteries with ISDN significantly increases from 80 to 155 cycles under demanding conditions. Furthermore, a lithium metal pouch cell of 439 Wh kg−1 delivers 50 cycles. This work opens a new avenue to develop additives by molecular modifications for practical lithium metal batteries.
中文翻译:
用于实用锂金属电池的高溶解性有机硝酸盐添加剂
锂金属负极的稳定性本质上决定了高能量密度锂金属电池的寿命。硝酸锂 (LiNO 3 ) 被广泛认为是一种有效的添加剂,可通过形成含 LiN x O y的固体电解质界面 (SEI) 来稳定锂金属负极。但其在电解质尤其是酯类电解质中的溶解性差,阻碍了其在锂金属电池中的应用。在此,建议使用有机硝酸盐硝酸异山梨醇酯 (ISDN) 来替代 LiNO 3。由于在分子中引入了有机链段,ISDN在酯类电解质中的溶解度高达3.3 M。ISDN分解生成LiN x O y-丰富的SEI,可实现均匀的锂沉积。在苛刻的条件下,采用 ISDN 的锂金属电池的使用寿命从 80 次循环显着增加到 155 次循环。此外,439 Wh kg −1的锂金属软包电池可循环 50 次。这项工作为通过分子修饰为实用的锂金属电池开发添加剂开辟了一条新途径。
更新日期:2022-11-15
中文翻译:
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用于实用锂金属电池的高溶解性有机硝酸盐添加剂
锂金属负极的稳定性本质上决定了高能量密度锂金属电池的寿命。硝酸锂 (LiNO 3 ) 被广泛认为是一种有效的添加剂,可通过形成含 LiN x O y的固体电解质界面 (SEI) 来稳定锂金属负极。但其在电解质尤其是酯类电解质中的溶解性差,阻碍了其在锂金属电池中的应用。在此,建议使用有机硝酸盐硝酸异山梨醇酯 (ISDN) 来替代 LiNO 3。由于在分子中引入了有机链段,ISDN在酯类电解质中的溶解度高达3.3 M。ISDN分解生成LiN x O y-丰富的SEI,可实现均匀的锂沉积。在苛刻的条件下,采用 ISDN 的锂金属电池的使用寿命从 80 次循环显着增加到 155 次循环。此外,439 Wh kg −1的锂金属软包电池可循环 50 次。这项工作为通过分子修饰为实用的锂金属电池开发添加剂开辟了一条新途径。