Lithium metal is regarded as a “Holy Grail” anode material because of its high theoretical specific capacity and uniquely low reduction potential. However, its low Coulombic efficiency and hazards caused by uncontrolled lithium dendrite growth have hindered its practical application in anodes for many years. In this work, we design a novel boron-containing single-ion conducting polymer electrolyte that eliminates the large electric field that Chazalviel has identified as the cause of lithium dendrite growth. The ability to inhibit lithium dendrite growth is demonstrated via galvanostatic cycling tests of Li/Electrolyte/Li cells. In addition, the boron-containing single-ion conducting polymer electrolyte exhibits excellent ionic conductivity (2.23 mS cm⁻¹) and an extremely high lithium-ion transference number (0.71). Moreover, the LiFePO₄/Electrolyte/Li cell exhibits an outstanding specific capacity of more than 130 mAh g⁻¹ and excellent capacity retention (90% of the highest capacity was retained after 100 cycles). This excellent performance indicates a promising strategy for development of safe, long-life lithium metal batteries.

锂金属由于其较高的理论比容量和独特的低还原电位而被视为“圣杯”阳极材料。然而，由于其低的库仑效率和由不受控制的锂树枝状晶体生长引起的危害，阻碍了其多年来在阳极中的实际应用。在这项工作中，我们设计了一种新颖的含硼单离子导电聚合物电解质，该电解质消除了Chazalviel认为是锂枝晶生长原因的大电场。通过Li /电解质/ Li电池的恒电流循环测试证明了抑制锂枝晶生长的能力。另外，含硼单离子导电聚合物电解质表现出优异的离子电导率（2.23mS cm ^-1）和极高的锂离子转移数（0.71）。此外，LiFePO ₄ /电解质/ Li电池表现出超过130 mAh g ^-1的优异比容量和优异的容量保持性（100次循环后保留了最高容量的90％）。这种优异的性能表明了开发安全，长寿命锂金属电池的有前途的策略。