无负极锂金属电池（AFLMBs）仅由正极集流体/正极/隔板/负极集流体和电解质组成，具有能量密度高，成本低等优点。针对无负极锂金属电池库伦效率低，循环稳定性差及枝晶生长问题，本课题分别从三维（3D）碳基负极集流体结构改性和构筑良好固体电解质界面（SEI）两方面展开研究，提高了无负极锂金属电池的电化学性能。（1）为了解决AFLMBs负极集流体较差的循环稳定性，容易产生枝晶、较差的亲锂性以及过高的成核过电位等问题，本课题利用水热法制造了一种碳包覆氧化锌纳米管包覆的碳布集流体（C@ZnOnts@CC）。利用锂锌合金化反应（2Li++ZnO+2e-→Zn+Li2O，xLi+Zn→LixZn）引导锂在单个无定形碳纳米管的一维（1D）中空空间内沉积，有效抑制了枝晶生长；碳壳具有双重作用：提供几何/机械约束和电子/离子传输通道；碳布的三维（3D）结构有效抑制了电池循环过程中的体积膨胀。与超高负载量的NCM811（22.5 mg/cm2，~4 mAh/cm2）正极配对的AFLMBs（NCM811‖C@ZnOnts@CC），无论是容量保持率还是循环稳定性都明显提高。（2）AFLMBs不稳定的固体电解质界面（SEI）严重限制了其电化学性能，本课题利用浓酸氧化处理无纺布，得到一种富含羧基（COOH），羰基（C=O），羟基（OH）等含氧官能团的无纺布集流体（AC）。AC集流体有助于形成高度导电的、完整的、坚固和富含无机成分（氧化锂Li2O、氟化锂LiF、碳酸锂Li2CO3和氮化锂Li3N）的SEI，促进了快速Li+转移，提高了SEI的杨氏模量，抑制了Li枝晶生长。AC集流体赋予全电池（NCM811‖AC）在高正极负载（25.33 mg/cm2，~4.5 mAh/cm2）条件下显著提高的容量保持率循环稳定性。综上，本文从结构化设计、调控固体电解质界面两方面对碳基负极集流体进行了改性研究，改善了锂沉积行为、提高了无负极锂金属电池的库伦效率和循环稳定性。

Anode-free lithium metal batteries (AFLMBs) is only composed of cathode current collector, cathode, separator, anode current collector and electrolyte, which has the advantages of high energy density and low cost. In order to solve the problems of low coulombic efficiency, poor cycle stability and dendrite growth of AFLMBs, this paper studied the structural modification of three-dimensional (3D) carbon-based anode current collector and the construction of good solid electrolyte interface (SEI), which improved the electrochemical performance of AFLMBs.(1) In order to solve the problems of poor cycle stability, dendrite, poor lithium affinity and excessive nucleation overpotential of AFLMBs anode current collector, a carbon coated zinc oxide nanotube coated carbon cloth current collector (C@ZnOnts@CC) was manufactured using hydrothermal method in this study. Lithium zinc alloying reaction (2Li++ZnO+2e-→Zn+Li2O, xLi+Zn→LixZn) is used to guide lithium deposition in the one-dimensional (1D) hollow space of a single amorphous carbon nanotube, which effectively inhibits dendrite growth. Carbon shell has dual functions: it provides geometric/mechanical constraints and electron/ion transport channels; Carbon cloth's 3D structure effectively inhibits the volume expansion during the battery cycle. The AFLMBs (NCM811‖C@ZnOnts@CC) paired with the cathode of NCM811 (22.5 mg/cm2) with ultra-high load obviously improved both the capacity retention rate and the cycle stability.(2) The unstable solid electrolyte interface (SEI) of AFLMBs seriously limits its electrochemical performance. In this paper, non-woven fabrics were oxidized by concentrated acid to obtain a non-woven fabric current collector (AC) rich in oxygen-containing functional groups such as COOH, C=O and OH. The AC current collector is helpful to form a highly conductive, complete, firm and inorganic-rich SEI (Li2O, LiF, Li2CO3 and Li3N), which promotes the rapid transfer of Li+, improves the Young's modulus of SEI and inhibits the growth of Li dendrites. The AC current collector endows the whole battery (NCM811‖AC) with significantly improved capacity retention and cycle stability under the condition of high cathode load (25.33 mg/cm2).To sum up, this paper studies the modification of carbon-based anode current collector from two aspects: structural design and adjustment of SEI, which improves the lithium deposition behavior and improves the coulombic efficiency and cycle stability of AFLMBs.