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深圳大学重磅突破!石墨炔终结锂硫电池 “穿梭效应”,能量密度飙升至 457Wh/kg

  • 2026-06-24 08:53:24
深圳大学重磅突破!石墨炔终结锂硫电池 “穿梭效应”,能量密度飙升至 457Wh/kg

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【导语】锂硫电池因超高理论能量密度(2600Wh/kg)、低成本硫资源丰富,被视为下一代储能技术的 “明星”,但 “穿梭效应” 始终是其商业化的最大障碍。近日,深圳大学王丹 / 于然波教授团队在《Nature Sustainability》发表重磅研究:通过 sp 杂化氮掺杂石墨炔构筑多壳层中空结构,成功抑制穿梭效应,实现近理论极限比容量,为高性能锂硫电池实用化开辟新路径。

START

一、锂硫电池的 “致命伤”:穿梭效应难破解

锂硫电池以硫为正极、金属锂为负极,理论能量密度是传统锂电池的 3-5 倍,且硫资源储量丰富、价格低廉,极具商业化潜力。

但实际应用中,可溶性多硫化物的 “穿梭效应” 始终是无法逾越的鸿沟:充放电过程中,硫会转化为可溶性多硫化物,从正极扩散至负极,与金属锂反应,导致活性物质流失、电池容量快速衰减、循环寿命缩短,严重制约其性能发挥。

传统解决方案(如添加宿主材料、催化剂)需引入大量非活性组分,虽能缓解穿梭效应,但会牺牲电池整体比容量与能量密度,形成 “性能与容量” 的两难困境。

二、深圳大学 “黑科技”:sp - 氮掺杂石墨炔多壳层结构,一箭双雕破难题

针对这一核心矛盾,深圳大学王丹 / 于然波教授团队创新性提出 **“空间耦合吸附与催化” 设计策略 **:在具有独特 sp-sp² 杂化碳骨架的石墨炔中,精准引入 sp 杂化氮,并构筑多壳层中空结构(sp-NGDY HOMS),成功化解 “穿梭效应” 与能量密度的矛盾。

这一突破性设计具备三大核心优势:

  • 高效抑制穿梭效应:sp 杂化氮可提供丰富的极性吸附位点,强极性吸附多硫化物;多壳层中空结构形成多级空间限域,像 “牢笼” 一样将多硫化物锁定在正极区域,彻底阻断穿梭路径,解决容量衰减难题。

  • 近理论极限比容量:独特结构实现93.9% 超高硫负载率(传统方案仅 60%-70%),基于硫与载体总质量的比容量达1462mAh/g,接近理论极限;软包电池能量密度达457Wh/kg,远超当前主流锂电池(200-300Wh/kg)。

  • 优异循环稳定性:空间耦合吸附与催化位点,加速多硫化物氧化还原动力学,降低反应能垒;中空结构缓冲硫充放电时的体积膨胀,600 圈稳定循环后容量保持率超 85%,高倍率(10C)下能量密度仍达 1384.5Wh/kg。

三、石墨炔:碳材料界的 “黑马”,性能碾压传统碳材料

石墨炔是一种由 sp 杂化和 sp² 杂化碳原子构成的新型碳材料,具有独特的二维平面结构、丰富的孔道、超高导电性和化学稳定性,性能全面超越石墨烯、碳纳米管等传统碳材料。

  • 结构优势:拥有亚纳米级孔道,可精准筛分离子;sp 杂化氮掺杂后,电子结构可调,吸附与催化性能显著提升。

  • 性能优势:导电性是石墨烯的 2 倍、碳纳米管的 5 倍;化学稳定性优异,可耐受强酸碱、高温环境,适配复杂电池体系。

  • 应用潜力:除锂硫电池外,在固态电池、钠离子电池、电催化、储能等领域均展现出巨大应用前景,被视为下一代碳基储能材料的核心。

四、行业影响:锂硫电池商业化提速,中国碳材料研究领跑全球

深圳大学的突破性研究,是中国在新型碳材料与高能电池交叉领域的重大原创成果,发表于国际顶级期刊《Nature Sustainability》,彰显中国在碳材料基础研究领域的全球领先地位。

这一成果的落地,将产生深远行业影响:

  • 技术层面:开创石墨炔在锂硫电池中的应用新方向,为解决 “穿梭效应” 提供全新思路,推动锂硫电池技术从实验室走向产业化。

  • 产业层面:457Wh/kg 的能量密度,可直接应用于新能源汽车、高端储能、航空航天等领域,带动锂硫电池产业链爆发,催生千亿级市场。

  • 竞争层面:打破国外在高能电池材料领域的技术垄断,提升中国在新能源核心材料领域的话语权,为中国新能源产业弯道超车提供新机遇。

五、产业化前景:从实验室到量产,加速推进中

目前,深圳大学团队已完成实验室验证与小试,性能指标稳定,重复性好,正联合国内电池企业推进中试与产业化落地,预计2-3 年内实现量产应用。

随着技术成熟、成本下降,石墨炔基锂硫电池有望率先在高端储能、航空航天等领域实现商业化,逐步向新能源汽车领域渗透,成为下一代储能技术的主流选择。

结语

从石墨烯到碳纳米管,再到石墨炔,中国在碳材料领域的研究不断突破,持续领跑全球。深圳大学王丹 / 于然波教授团队的突破性研究,不仅破解了锂硫电池商业化的核心瓶颈,也为新型碳材料在储能领域的应用开辟了广阔空间。随着产业化进程加速,石墨炔基锂硫电池有望重塑全球储能产业格局,助力中国实现 “双碳” 战略目标。

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  1. CONNECT:[ UseTime:0.000673s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001121s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000353s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000296s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000674s ]
  6. SELECT * FROM `set` [ RunTime:0.000225s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000754s ]
  8. SELECT * FROM `article` WHERE `id` = 581596 LIMIT 1 [ RunTime:0.004992s ]
  9. UPDATE `article` SET `lasttime` = 1782414915 WHERE `id` = 581596 [ RunTime:0.006965s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000689s ]
  11. SELECT * FROM `article` WHERE `id` < 581596 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000544s ]
  12. SELECT * FROM `article` WHERE `id` > 581596 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000463s ]
  13. SELECT * FROM `article` WHERE `id` < 581596 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001142s ]
  14. SELECT * FROM `article` WHERE `id` < 581596 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007181s ]
  15. SELECT * FROM `article` WHERE `id` < 581596 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012048s ]
0.110630s