第2398章 基石

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的‘穿梭效应’,充放电过程中多硫化物溶解穿梭到负极导致活性物质损失和容量衰减同样致命。”
    屏幕上展示了传统锂硫电池中,多硫化物在电解液中穿梭的糟糕场景。
    “王诚那个小电池,用的还是普通正极材料,能量密度提升有限。但‘诱导均匀沉积’这个思路启发了我们。”邢教授眼中终于有了一点属于研究者的亮光,“既然陶瓷界面可以‘引导’锂离子,那有没有可能,在正极材料内部,也设计一种结构,来‘束缚’住那些调皮的多硫化物,不让它们乱跑?”
    他放大了图像,可以清晰看到,在正极活性物质硫的载体内部,均匀分布着无数极其微小的、中空的碳球,直径在微米级别,碳球壁是经过特殊处理的、具有丰富微孔和特定官能团的结构。
    “我们受了一些自然界结构的启发,比如莲蓬、比如蜂巢。这些空心碳球,就像一个个微型的‘牢笼’。硫被装载进去后,在充放电过程中产生的多硫化物,大部分会被限制在这些碳球的内部空间和孔隙中,大幅减少了它们溶解到本体电解液中的机会。同时,碳球壁的化学特性也能吸附、催化多硫化物,促进其转化,进一步减轻穿梭效应。”
    动画演示变得更具说服力:多硫化物在空心碳球内部“挣扎”,却难以大量逸出,充放电循环得以更高效、更稳定地进行。
    “当然,实际要复杂得多。”邢教授关闭了动画,语气恢复了平淡,“电解液的匹配、导电网络的构建、整体电池结构的设计、制造工艺……每一步都是难关。我们从王诚那个玩具电池的灵感出发,用了近四百天,失败了上千次,才做出了‘基石-α’的初代原型。它现在能量密度确实很高,5C放电性能如各位所见,低温性能也优于现有体系,循环寿命初期测试数据……也还可以。”
    他没有说具体数字,但那种轻描淡写的“还可以”,配合刚才那惊人的测试数据,反而更让人心惊。
    “成本呢?”安德鲁·卡莱尔终于忍不住,声音有些发颤地问出了最关键的问题之一。任何颠覆性技术,如果成本高昂到无法量产,其意义将大打折扣。
    邢教授看向李钧。李钧接过话头,语气依旧平稳:“陶瓷界面层和空心碳球载体的原材料并不昂贵,主要是高纯度的碳源和一些常见的金属氧化物。真正的挑战在于合成与制造工艺。我们开发了一套基于流化床和激光诱导的连续化制备工艺,目前还在优化,但初步估算,在达到一定规模后,‘基石-α’体系每千瓦时的材料成本,有望低于目前特斯拉4680电池的15%到20%。当然,这需要时间和进一步的工程化放大验证。”
    低于现有顶尖电池成本的15%-20%!
    这个数字,结合那五倍以上的能量密度和优异的倍率性能,构成的已经不是技术优势,而是对现有产业逻辑的彻底碾压。
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